Merge branch 'network-assets' into 'master'

Replace raphael-rails with raphael.js and split it from the rest of the JS

## What does this MR do?

Removes raphael.js and its related libraries from the default JS bundle.

It also removes raphael-rails because the gem is unmaintained and – for whatever reason – didn't want to cooperate with the way I was trying to require it.

This brings the default (compressed and minified) application.js from 354KB after the d3 MR (!4394) down to 324KB.

## Are there points in the code the reviewer needs to double check?

That tests pass and that there aren't errors on any pages (especially the Network page).

## Why was this MR needed?

It's only used on the Network page and was using way too much bandwidth for just one page.

## What are the relevant issue numbers?

#14372 #13165 

Follow-up to !4394 and !4516.

cc: @jschatz1 

See merge request !4519

4 files changed, 20 insertions, 4 deletions

diff --git a/app/assets/javascripts/application.js.coffee b/app/assets/javascripts/application.js.coffee
index 6c16f89cef6..cb7d11ad472 100644
--- a/app/assets/javascripts/application.js.coffee
+++ b/app/assets/javascripts/application.js.coffee
@@ -32,10 +32,6 @@
 #= require bootstrap/tooltip
 #= require bootstrap/popover
 #= require select2
-#= require raphael
-#= require g.raphael
-#= require g.bar
-#= require branch-graph
 #= require ace/ace
 #= require ace/ext-searchbox
 #= require underscore
diff --git a/app/assets/javascripts/network/application.js.coffee b/app/assets/javascripts/network/application.js.coffee
new file mode 100644
index 00000000000..cb9eead855b
--- /dev/null
+++ b/app/assets/javascripts/network/application.js.coffee
@@ -0,0 +1,20 @@
+# This is a manifest file that'll be compiled into including all the files listed below.
+# Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
+# be included in the compiled file accessible from http://example.com/assets/application.js
+# It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
+# the compiled file.
+#
+#= require raphael
+#= require g.raphael
+#= require g.bar
+#= require_tree .
+
+$ ->
+  network_graph = new Network({
+    url: $(".network-graph").attr('data-url'),
+    commit_url: $(".network-graph").attr('data-commit-url'),
+    ref: $(".network-graph").attr('data-ref'),
+    commit_id: $(".network-graph").attr('data-commit-id')
+  })
+
+  new ShortcutsNetwork(network_graph.branch_graph)
diff --git a/app/assets/javascripts/branch-graph.js.coffee b/app/assets/javascripts/network/branch-graph.js.coffee
index f2fd2a775a4..f2fd2a775a4 100644
--- a/app/assets/javascripts/branch-graph.js.coffee
+++ b/app/assets/javascripts/network/branch-graph.js.coffee
diff --git a/app/assets/javascripts/network.js.coffee b/app/assets/javascripts/network/network.js.coffee
index f4ef07a50a7..f4ef07a50a7 100644
--- a/app/assets/javascripts/network.js.coffee
+++ b/app/assets/javascripts/network/network.js.coffee