- Remove redis gem dependency version
- Added total_retained and retention methods for directly calculating retention between to period ranges.
- Update redis gem dependency to ~3.2
- BREAKING CHANGE: Removed dependency on redis-bitops, which while conserving space resulted in significant degradation of performance due to the additional overhead of tracking chunks and additional bit operations.
- Updated to latest redis-bitops, which includes multiple fixes and performance improvements.
- Refactor to ensure that unique_active is properly measured across measurement periods.
- Fixed default group. Was erroneously using an empty string instead of the string 'default'.
- Added unique_active method
- Fixed ActiveSupport require declaration
- Added support for directly providing a Redis connection