Merge pull request #8 from johnnyshields/master

Code cleanup + Mongoid options pass-thru
Merge branch 'johnnyshields-master'
fix ERROR: While executing gem build (Gem::InvalidSpecificationException):
['lib/mongoid/taggable_with_context/group_by/aggregation_strategy/real_time.rb', 'lib/mongoid/taggable_with_context/group_by/taggable_with_context.rb'] are not files
bump version 1.1.1 fixing Gem::InvalidSpecificationException
fix Travis CI build failure: Build #39
+group :test, :development do
clean up mongoid_taggable_with_context.gemspec
Rebase/squash version 2.0.0 on lgs master