Add groups index and show
provide a way to clear contexts
Fix issue with defining a group and add specs.
Massive refactor of data collection out of metric.
Add specs for redis store
Store metric data by group.
Abstract out configuration methods
Key metric data flexible auto-increment uids
Add increment hash by float to redis store.
Update TODO with notes on funnels
Record segment metrics
Simplify accessing configuration.
Determine segments from context
Add metrics by segment