Sparse Count Vector, Matrix, and Featurizer using parallel arrays
Merge branch 'master' into matt/dev
copious quopying to counts
Fixed incorrect sorting and added SparkCountFeaturizerTest.
Merge branch 'master' into matt/dev

Conflicts:
	spark/src/test/scala/org/sblaj/spark/SparkBinaryFeaturizerTest.scala
FeatureExtractor with init and close methods
Added SparkIO count methods, cluttered
Float counts
Merge branch 'matt/sparse_counts' into matt/dev

Conflicts:
	spark/src/main/scala/org/sblaj/spark/SparkCountFeaturizer.scala
merge cleanup
Fixed tests, removed CountFeaturizer
Merge pull request #2 from mgedigian/matt/dev

Float counts