Adds Mongoid adapter
Fixes bug in sequel adapter
Serializes children in sequel adapter
Adds all adapters to integration test
Fixes bug with duplicate points
Adds extra sanity-check to integration spec
Fixes performance issues in aggregator
Permits benchmarking with different datasets
Fixes memory adapter for tests
Fixes Mongo adapter (unsatifactorily)
Adds sanity check to Pair constructor
Improves speed by 50% (aggregates in memory)