*nix with non-standard libjpeg/png/zlib locations was broken.
in the case of python this makes it easier to move to find_package(PythonLibs) when 3.x is supported.
- moved files in proper directories and adapted paths where needed
- deleted doc/oldbugs.txt (asked confirmation to jesterking a week ago in irc)
- still working on doxygen files, for now I'll leave them in doc/
- NOTE: while checking if other files were referring to these files, I noted that
"GPL-license.txt" is also used in the files below:
- release/windows/installer/00.sconsblender.nsi
- release/windows/specific.sh
but these files should't be affected by this commit, but please check :)