Bump Spark to version 1.0.2 

Bumped  Spark version to 1.0.2 and made minor modifications to support changes in API packages.

Not sure this is doable right now but it was not very invasive so thought I submit in case there was an interest.

-Todd
Please clean up all import statements:
all third party go above the com.datastax,
java at the top, then akka, then third party, then datastax at the bottom.

Remove any unused imports.

Thanks.