first implimentation of restricted copy/paste
make copy plugin use localstorage if available
Merge pull request #53 from oerpub/ticket-484

Implement a copy and paste plugin for the editor
some bugfixes to headings
allow clicking on empty headings
refactor section copying

Conflicts:

	src/plugins/oer/toolbar/lib/toolbar-plugin.coffee
	src/plugins/oer/toolbar/lib/toolbar-plugin.js
Merge branch 'master' into feature530