add basic example element
fix mapping error for examples'
update example styling
remove debugging code in example plugin
style change for examples
Merge remote-tracking branch 'origin/master' into ticket-364

Conflicts:
	src/plugins/oer/note/lib/note-plugin.coffee
	src/plugins/oer/note/lib/note-plugin.js
use fixed selector for examples
make exercises display properly for unrecognized types
fix title handling for examples with unknown types
Merge pull request #48 from oerpub/ticket-364

example element