simple validation for the event form dropdown

added the guard gem
added moment.js to the datetime field
26 Make image trimmer closeable

X button in top right corner now closes the image trimmer
Merge branch 'master' into image_trimmer

Conflicts:
	app/assets/javascripts/kiwi/views/event_form.js.coffee
Cleaned up trailing whitespace.

Because whitespace at the end of a line is bad.
Added jasmine rice and a sample spec

You can now test at http://localhost:3000/jasmin
Merge branch 'master' into user_management