Revert Berksfile.
Exclude casks.
Manage ~/.rbenv directory
Revert "Manage ~/.rbenv directory"

This reverts commit 759c10cd5267e36341c7d6b72e1f016907605245.
Change to use system ruby for chef and berkshelf temporary.
ref: http://stackoverflow.com/questions/22352838/ruby-gem-install-json-fails-on-mavericks-and-xcode-5-1-unknown-argument-mul
Need sudo
Upgrade berkshelf to 3.x
Merge branch 'master' of github.com:spesnova/cooker
Update Berkshelf to support berkshelf3
Use full path
Update Berksfile.lock
Use ruby 2.1.2
Use berks install instead of berks vendor
Merge branch 'spesnova/use-system-ruby-for-chef'

Conflicts:
	.chef/Berksfile.lock
	script/cooker