Using DevelopmentServerNewJRuby as main class for development server

I realised that there is an issue with using intellij on java 1.7 with develoment-server config.
Figured out by changing it to the development-server-new-jruby and changing the main class i'm able to run the porject on intellij.
Here I have update the images and the documentation on setting up dev environment.
More information on : https://groups.google.com/forum/#!topic/go-cd/sLKP6p1RKNA