Squashed commit of the following:
* Bump version v1.1.6 [Vladislav Shub]
* Added tests for tags [Vladislav Shub]
* Added support for views namespace and tags conversion [Vladislav Shub]
* Added support for tags for fast delete of multiple values [Vladislav Shub]
* Added support for initializer param for tags :use_tags => true [Vladislav Shub]