Initial crack at the feature store implementation
FeatureStore almost complete (other than some odds and ends)
Adding equals() and hashCode() to the BaseFeature
Removing unused map and method from FeatureRegistry
Incorporate BigInteger into StatsCombiner
Adding variance method which uses BigDecimal
Adding metrics store as an extended store
Adding some comments and renaming some classes
More cleanup and documentation
Renaming FeatureEntryTransform to FeatureTransform
Renaming metric time unit to a name that first better. problem is, now it clashes with TimeUnit in concurrent. We'll need to find a better name for this.
Adding unit test for metric feature config
Pulling single argument constructor for Metric from MetricFeature into Metric. Adding test for Metric
Adding feature store test for new save(Iterable<Feature>, Iterable<TimeUnit>) method
Adding license headers
Adding more license headers
Merge pull request #151 from calrissian/FeatureFix

Feature Store Implementation (pluggable feature vector store)