more REST docs
grammar fixes
document respond method
document responseFormats property
documentation updates to "What's new" guide
fix wrong version
more upgrade notes
simple updates
more doc on dependency changes
Merge pull request #140 from bobbywarner/master

Simple Updates
note about the --debug-fork command line argument
Merge branch 'master' of github.com:grails/grails-doc
remove Ant build file
Merge branch '2.1.x' into 2.2.x
Merge branch '2.2.x'