added support for mongoid >= 3.0 indexes, added created_at field to RatingMark
code reformatted
removed jeweler, removed bson_ext dependency, removed depracations, updated gemspec, updated specs (due to mongoid/origin)
gemspec bundler version update
updates gemspec to bundler format, added version
Merge branch 'master' of git://github.com/hck/mongoid_rateable into hck-master

Conflicts:
	.rvmrc
	Gemfile
	VERSION
	lib/mongoid_rateable/rateable.rb
	mongoid_rateable.gemspec
updated README
added rake to Gemfile
added default rake task (spec)
added gemcutter to Gemfile
added jeweler to Gemfile
Version bump to 0.0.0
Version bump to 0.2.0
Version bump to 0.2.0
added unweighted rating
Version bump to 0.2.1
fixed repeated developer dependencies
added previous rating and ratings delta
Version bump to 0.2.2
added specs for embedded documents