Updated the version of genomics API library.
An initial stab at an RDD for Variant Store.  The current variant examples work fine, but if when one tries to access additional fields such as alternateBases and calls, there are some class cast exceptions.
Now explicitly converting from the model object to Map.

The prior conversion via collection.JavaConversions was not correctly converting all fields.
Fixed the semantics of a print statement and added caching.

Per feedback from @elmer-garduno.
Merge pull request #1 from deflaux/master

An initial stab at an RDD for Variant Store.