Merge pull request #82 from fjfdepedro/master

Mongoid: Serialize to JSON with an string id attribute for mongoid 4
Merge pull request #83 from fjfdepedro/master

simple captcha styles
Fixes #85
Merge pull request #88 from jcarlosgarcia/master

Fixes #85
font-awesome
Merge pull request #89 from jcarlosgarcia/master

Added font-path to font-awesome.scss. Fixes #85
cookie images