Drop Sprockets depend_on

Sprockets does not require depend_on for our use case since v2.1.4
Drop the directives, and instruct Rails users to use sprockets-rails
v2.1.4+.

Profit: Bower package can now be used from Rails

Related issues: #592, #689

README.md

@@ -64,6 +64,10 @@ When using [bootstrap-sass Bower package](#c-bower) in Rails, ensure [minimum Sa
 
 `bootstrap-sprockets` must be imported before `bootstrap` for the icon fonts to work.
 
+#### Rails 4.x
+
+Please make sure `sprockets-rails` is at least v2.1.4.
+
 #### Rails 3.2.x
 
 Rails 3.2 is [no longer maintained for bugfixes](http://guides.rubyonrails.org/maintenance_policy.html), and you should upgrade as soon as possible.

assets/stylesheets/bootstrap/_glyphicons.scss

@@ -1,7 +1,3 @@
-//= depend_on "bootstrap/glyphicons-halflings-regular.eot"
-//= depend_on "bootstrap/glyphicons-halflings-regular.svg"
-//= depend_on "bootstrap/glyphicons-halflings-regular.ttf"
-//= depend_on "bootstrap/glyphicons-halflings-regular.woff"
 //
 // Glyphicons for Bootstrap
 //

tasks/converter/less_conversion.rb

@@ -114,7 +114,6 @@ class Converter
           when 'thumbnails.less', 'labels.less', 'badges.less'
             file = extract_nested_rule file, 'a&'
           when 'glyphicons.less'
-            file = bootstrap_font_files.map { |p| %Q(//= depend_on "bootstrap/#{File.basename(p)}") } * "\n" + "\n" + file
             file = replace_rules(file, '@font-face') { |rule|
               rule = replace_all rule, /(\$icon-font(?:-\w+)+)/, '#{\1}'
               replace_asset_url rule, :font

tasks/converter/network.rb

@@ -60,7 +60,7 @@ class Converter
     # get sha of the branch (= the latest commit)
     def get_branch_sha
       @branch_sha ||= begin
-        if %x[git rev-parse #@branch].chomp == @branch
+        if @branch + "\n" == %x[git rev-parse #@branch]
           @branch
         else
           cmd = "git ls-remote #{Shellwords.escape "https://github.com/#@repo"} #@branch"