Update jquery.colorbox-min.js

Add some more options

rel("colorbox-rel"): http://www.jacklmoore.com/colorbox/#setting-rel
title("colorbox-title"): http://www.jacklmoore.com/colorbox/#setting-title
className("colorbox-class-name"): http://www.jacklmoore.com/colorbox/#setting-className

Remove .idea directory

Update README

Bump version and clean gemspec

Update colorbox creation method (need for  attribute work), update README, bump version