Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/scala/com/intel/spark/FPGrowth.scala

Update to Version 2.0

In this version, I add ParallelFPGrowth.scala
into this project, which
has been partly accomplished. Until now,
computing the frequency list of
transactions database and dividing
transactions into Q groups have been
implemented in
ParallelFPGrowth.scala. I will add the remaining features
later.
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/scala/com/intel/spark/FPGrowth.scala