Revert "Added basic tabbing support"

This reverts commit c94834da43314bd6792803e692d872fd8fa72245.
Merge branch 'master' of github.com:ad-dc/rich

Conflicts:
	lib/rich.rb
	vendor/assets/ckeditor/ckeditor-contrib/plugins/liTab/plugin.js
Added 'remove' button to rick picker that blanks out the input's val