Merge branch 'release/v0.6.4'
added 2.2 info to readme
Update grunt task name for 'run' task.

Removed grunt complaint about obsolete 'server' task.
Update README.md
updating to play 2.3
fixes for sbt-yeoman
fixed issues and updated demo
updated plugin to use code from dist instead of app
fixed issue with stage
updated version and readme
fixes #50
added setting for cross build
updated demo to use scala 2.11.1 and undid changes to sbt-yeoman from previous commit
removed unnecessary beforeStart hook
Update README.md

Adding 0.7.1-SNAPSHOT instructions
minor fixings
Update README.md
added a setting to disable force option on grunt tasks