Remove bson_ext dependency
Merge pull request #11 from lasseebert/support-for-all-criteria

Added support for all-criteria
Merge pull request #10 from cmartyn/master

Remove explicit bson_ext dependency
fixed broken specs
Merge pull request #12 from ballou88/fix-spec

fixed broken specs
upgrade version
upgrade version
Add support for Mongoid >= 3.1.0
Merge pull request #13 from kdayton-/master

Support for Mongoid >= 3.1
upgrade version
upgrade doc
bug fix - returns an empty array even if tag_list is equal to nil
Merge pull request #14 from lucasrenan/master

bug fix - returns an empty array even if tag_list is equal to nil
minor fix