minor cleanup
some utils for saving datasets generated w/ spark
working version of writing vectors in a binary format straight from spark / hadoop
now you can write RDD[BaseSparseBinaryVector] w/out any IntWritable wrapper crap
small comment
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