#147 - Sass is a gem in JRuby now. Use it.
This feature toggle allows us to switch the JRuby and jruby-rack versions
during the switch from Rails 2.3 to Rails 4. Changes include:

* New toggle in SystemEnvironment ("use.new.rails").
* JRuby jars checked into server/jruby_jars
  - Removed dependency from server/pom.xml.
* Changed packaging in cruise-modules.rb to include all 4 JRuby jars.
* Created new module development-server-new-jruby
  - Its pom.xml has a dependency on new JRuby, for dev server.
* development-server/pom.xml has old JRuby dependency added.
  - Allows people to continue to use their dev server setup with old Rails.
* Changes in GoServer.java to switch JRuby versions.
  - Just like addons, adds the correct JRuby jars to web app classpath.
  - Switches rails.root to /WEB-INF/rails.new for new JRuby.
* Comment rails.root which was hard-coded in web.xml.
#130 - Making bouncy castle toggleable.

JRuby 1.7.11 needs bcprov-jdk15on-1.47.
Older JRuby continues to use bcprov-jdk16-140.jar.
pom dependency is left behind, temporarily, since it is needed at compile time.
#130 - Started Rails 4 app.

Steps taken:
* Install rails 4.0.4 externally using an rvm gemset.

* Create a new rails project:
  cd server/webapp/WEB-INF
  rails new go --skip-bundle --skip-active-record --skip-javascript --skip-test-unit
  mv go rails.new

* Remove everything except rails '4.0.4' from rails.new/Gemfile

* Install required gems into rails.new/vendor/bundle:
  cd rails.new
  ../../../../tools/bin/go.jruby -S bundle install --standalone --path vendor/bundle

* Remove line in vendor/bundle/jruby/1.9/gems/thread_safe-0.3.3-java/.gitignore
  with content lib/thread_safe/jruby_cache_backend.jar. This causes the jar to
  not be checked in and fails to start the server.
#130 - Configure Rails 4 app.

Bundler is loaded specifically, in boot.rb.
Remove config of unused parts of rails.
#130 - Fix Felix to work with JRuby 1.7.11.

Felix adds a URLHandler to the URL class of Java, which causes
JRuby to fail to load any JARs inside its jruby-complete-1.7.11.jar.
For more info: http://felix.apache.org/site/apache-felix-framework-faq.html
Merge pull request #169 from bsharanya/master

Groundwork for rails upgrade.