[docs] Rename MWM to MAPS, also remove NDK version

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+# MWM Files
+
+MAPS.ME uses maps in its own vector format, MWM. It contains classified features sorted and simplified by zoom level.
+For car routing, it needs a separate routing index in a `.mwm.routing` file. We build maps for the entire planet:
+
+* [daily.mapswithme.com/direct/latest](http://direct.mapswithme.com/direct/latest/) - official maps bundled with releases.
+
+## Building
+
+For building maps, you need compiled Generator Tool and, for routing indices, OSRM backend.
+See [INSTALL.md](INSTALL.md) for compilation instructions. We usually use this line:
+
+    CONFIG=gtool omim/tools/unix/build_omim.sh -cro
+
+Scripts described here require OSM C Tools, which are maintained as a submodule of the omim repository.
+
+### A Single Region
+
+Having built a generator tool, prepare a source file in pbf/o5m/bz2 format, and run:
+
+    omim/tools/unix/generate_mwm.sh source.pbf
+
+In some minutes it will create a similarly-named `.mwm` file in the same directory as the original file.
+Specify `TARGET` variable for changing that (e.g. `TARGET=.`). The script runs `generator_tool` twice,
+see `find_generator_tool.sh` script for an algorithm on how it finds it. All temporary files are created
+with `mktemp` and then removed.
+
+The resulting file won't have any coastlines, though MAPS.ME will overlay zoomed-in map with a low-quality
+generalized coastline. To add a detailed coastline, you would need a `WorldCoasts.geom` file and
+a [border polygon](http://wiki.openstreetmap.org/wiki/Osmosis/Polygon_Filter_File_Format) for a source
+file area. Having that, run (and prepare to wait a bit longer):
+
+    COASTS=WorldCoasts.geom BORDER=source.poly omim/tools/unix/generate_mwm.sh source.pbf
+
+A car routing index will be built when you specify a second parameter: either a full path to a Lua script
+with a routing profile, or any gibberish, in which case a default `car.lua` from omim repository
+would be used. For example:
+
+    omim/tools/unix/generate_mwm.sh source.pbf asdf
+
+Inter-mwm navigation requires another index inside a `.mwm.routing` file. To build it, you would need
+border polygons for not only the source region, but all regions neighbouring it. The source border polygon
+must have the same name as the source file (e.g. `Armenia.poly` for `Armenia.pbf`), and in the target
+directory shouldn't be a `borders` subdirectory. With all that, just use this line:
+
+    BORDERS_PATH=/path/to/polygons omim/tools/unix/generate_mwm.sh source.pbf asd
+
+### The Planet
+
+To create a bunch of MWM files for the entire planet, splitting it by border polygons, we have
+a different script, `generate_planet.sh`. It will print a short help when run without arguments.
+The usual line we use is:
+
+    TARGET=/opt/mwm/151231 omim/tools/unix/generate_planet.sh -a
+
+This is a shortcut for following options:
+
+* `-u`: update a planet file from osm.org (use `-U` when you need to download one, specify `PLANET`
+variable if it's not in `$HOME/planet/planet-latest.o5m`).
+* `-l`: filter and process coastlines, creating `WorldCoasts.geom` and `.rawgeom` files.
+* `-w`: generate overview maps, `World.mwm` and `WorldCoasts.mwm`.
+* `-r`: generate routing indices, `.mwm.routing` file for each `.mwm`.
+
+All border polygons from `BORDERS_PATH` are processed into MWM files by default. You can
+specify only required polygons in `REGIONS` variable, or set it to empty value, so no regular
+MWM files are created. The whole process takes 15 hours on a 40-core server, so we suggest
+you specify your e-mail address in a `MAIL` variable and get a mail when the generation
+is finished.
+
+If a previous run ended with an error, the next one will ignore arguments and continue with
+the same arguments as the previous time. Set `-c` option to ignore the stored status.
+
+Log files for each region and the entire process (`generate_planet.log`) are written to
+`logs` subdirectory of the target. Intermediate data requires around 250 MB of space, and
+to clean it during the process, specify `KEEP_INTDIR=` empty variable.
+
+#### Steps
+
+The planet generation process is divided in several steps, which are printed during the
+script run, along with timestamps. To start generation from a specific step, specify it
+in the `MODE` variable (and make sure you don't have stored status, or run with `-c`
+option).
+
+* Step 1 (`coast`): updating planet file.
+* Step 2: filtering and processing coast lines. If there was a merge error, the script
+prints way identifiers, waits 40 minutes and tries again from step 1.
+* Step R: preparing `.osrm` files for routing indices. PBF files for each region are
+cut out of the planet, then OSRM backend scripts process each of these. Can work
+asynchronously if `ASYNC_PBF=1` variable is set.
+* Step 3 (`inter`): generating intermediate data for the planet.
+* Step 4 (`features`): generating features for each region, splitting the planet.
+* Step 5 (`mwm`): building the resulting MWMs.
+* Step 6 (`routing`): building `.mwm.routing` files out of MWMs and `.osrm` files.
+* Step 7 (`resources`): updating resource and map lists.
+* Step 8 (`test`): calling `test_planet.sh` to run routing tests.
+
+### Variables
+
+Almost every default in the script can be redefined with environment variables.
+You will have to use some of these, unless you are using our map-building servers.
+
+* `GENERATOR_TOOL`: a location of `generator_tool` program. Example: `~/omim-build-debug/out/debug/generator_tool`.
+* `BUILD_PATH`: a path to either `generator_tool` or its build directory. Example: `~/omim-build-debug`.
+* `PLANET`: pa ath or name of the planet file. If there is no file, specify `-U` option,
+and it will be downloaded. Should be in o5m format. Default is `~/planet/planet-latest.o5m`.
+* `TARGET`: a target path for `mwm` and `routing` files. Some temporary subdirectories
+will be created inside: `logs`, `borders` and `intermediate_data`.
+* `MAIL`: comma-separated e-mail addresses, which will receive notifications about
+finished or failed generation.
+* `OSMCTOOLS`: a path to pre-compiled OSM C Tools: `osmconvert`, `osmupdate` and
+`osmfilter`. If these were not found, it will compile sources from the repo.
+* `OMIM_PATH`: a path to the omim repository root. Will be guessed when the
+script is not moved from `omim/tools/unix`. It is needed for locating a data
+directory (`omim/data`, can be overridden with `DATA_PATH`), generator tool
+build path (see `BUILD_PATH`) and OSRM backend scripts (see `OSRM_PATH`).
+* `OSRM_PATH`: a path to `omim/3party/osrm/osrm-backend`. Needed for searching
+for a routing profile (`$OSRM_PATH/profiles.car.lua` by default, but can be
+overridden with `PROFILE`) and for osrm executables (`$OSRM_PATH/build`,
+or set `OSRM_BUILD_PATH`).
+* `DATA_PATH`: a path to classificators and border polygons; the latter can
+be redefined with `BORDERS_PATH`.
+* `INTDIR`: a temporary directory that is created when the script starts, and
+removed when `KEEP_INTDIR` is clean and the script ends. Contains `status` file
+that keeps script arguments for resuming processing, and `osrm_done` file,
+which is a flag for successful OSRM indices building process.
+* `KEEP_INTDIR`: if empty (by default it is not), the temporary directory will
+be deleted when the script finishes. Note that it might have `WorldCoasts.geom`
+file, built on step 2, which is required for generating coastlines (step 4).
+* `NODE_STORAGE` (or `NS`): where is a node cache kept: in memory (`mem`, which
+is the default), or on disk (`map`). Tests show that for a complete world,
+with `map` the process eats some hundreds of gigabytes and crashes, while with
+`mem` the memory consumption is stable at around 40 GB.
+* `ASYNC_PBF`: by default, pbf files for routing are built between steps 2 and 3,
+but if this flag is set (e.g. to `1`), they are built asynchronously. But
+it can fail due to low memory.
+* `MERGE_INTERVAL`: delay in minutes between attempts to merge a coast line.
+Default is 40.
+* `REGIONS`: a list of `.poly` files for regions to be built. Can be empty.
+Example: `../../data/borders/UK* ../../data/borders/*Ireland*`.
+
+### Testing
+
+To test that the generator is not broken, you don't have to wait for 20 hours processing
+the whole planet: instead download [a 150 MB extract](http://osmz.ru/mwm/islands/) with
+some islands and the corresponding script `islands.sh` and put these into `omim/tools/unix`.
+Run the script with options for `generate_planet`, e.g.
+
+    omim/tools/unix/islands.sh -lwr
+
+In a half an hour you'll get files for 4 regions in a `target` subdirectory. Note that
+you can build both generator tool and OSRM backend with the `build_omim.sh` script.