did group_by functionality, version bump
added spec for when there's no tags
opp. change tag_name_attribute form name to _name and forgot something in refactor
change group_by to group_by_field
Added tags_string method
Tags are now persisted in a tag called "tags" rather than "tags_array", which is much more natural and inline with what other tagging gems do.
Refactored "context_array" and "array_field" to "database_field" and "field" respectively.
Updating README
Merge pull request #2 from johnnyshields/master

Made tags setter be able to handle both String and Array + Mongoid 3 changes
s12chung pull request has been manually merged
fix build and dependency status to README
modified: .travis.yml by adding 'services: mongodb'
see http://about.travis-ci.org/blog/august-2012-upcoming-ci-environment-updates/
gem Version 0.8.2, is green just for Ruby 1.9.3 on Trevis CI ...
Merge branch 'master' of https://github.com/lgs/mongoid_taggable_with_context into use_array_as_base

Keeping version as 1.0.0
bump version 1.0.0 according to johnnyshields, because the commit could potentially breaks existing code, as stated in previous johnnyshields example. ( see: https://github.com/lgs/mongoid_taggable_with_context/pull/4#issuecomment-13649286 )
update gemspec metadata: wrong date for rubygems.org deploy '0.8.2' and '1.0.0'
Upgrade to Ruby 1.9 hash syntax. Not a problem since this gem requires Mongoid >= 3.0.0, which itself requires Ruby 1.9