Now with better CMS hashing, easier Aggregations, and more!

• Replace mapValues with one single map to avoid serialization in frameworks like Spark. #344
• Add Fold trait for composable incremental processing (for develop) #350
• Add a GC friendly LRU cache to improve SummingCache #341
• BloomFilter should warn or raise on unrealistic input. #355
• GH-345: Parameterize CMS to CMS[K] and decouple counting/querying from heavy hitters #354
• Add Array Monoid & Group. #356
• Improvements to Aggregator #359
• Improve require setup for depth/delta and associated test spec #361
• Bump from 2.11.2 to 2.11.4 #365
• Move to sbt 0.13.5 #364
• Correct wrong comment in estimation function #372
• Add increments to all Summers #373
• removed duplicate semigroup #375
• GH-381: Fix serialization errors when using new CMS implementation in Storm #382
• Fix snoble's name #384
• Lift methods for Aggregator and MonoidAggregator #380
• applyCumulative method on Aggregator #386
• Add Aggregator.zip #389
• GH-388: Fix CMS test issue caused by roundtripping depth->delta->depth #395
• GH-392: Improve hashing of BigInt #394
• add averageFrom to DecayedValue #391
• Freshen up Applicative instances a bit #387
• less noise on DecayedValue tests #405
• Preparer #400
• Upgrade bijection to 0.7.2 #406