Fixed amberc.js Issue#617
Merge pull request #618 from tomrake/issue617

Fix #617 amberc.js

"amberc.js fails to generate proper calls for the 'main_class' option same error for amberc -m option."
Remove unused code in Gruntfile
Remove unused grunt libraries from package.json
Remove unused grunt-css2js
fix json syntax from bad rebase
reformatting package.json

install and uninstall using npm ... -save-dev
Merge pull request #621 from herby/johnnyt-bad-merge

grunt cleanup from johnnyt
Merge branch 'master' into requirejs

Conflicts:
	bin/amberc.js
	package.json