add CompositeRowTupleMapper
only write tuple values for values that aren't in the row
minor formatting and doc additions
Fixed some weird unboxing error resulting in a cast error when trying to
get the port.
Merge pull request #39 from boneill42/master

Upgrade to Storm 0.9.0.1
Merge branch 'master' of https://github.com/jansonhanson/storm-cassandra
Merge branch 'master' of github.com:hmsonline/storm-cassandra
Merge branch 'composite-row-tuple-mapper' of https://github.com/strongh/storm-cassandra
Cleanup