stub tests for noderesult and new targetActivity.data object
WIP.  Good stub of a NodeResult for submissions with a few outstanding questions.
return proper response from ips submission
nodeResult from submission appended to sequenceNode in Redis
clean up interactions.  send interaction specific resultNode
clean up some comments
return immediately with interactives in controller and fix integration tests.  clean up redis in ips tests.
adding sequenceNodeKey as child under targetActivity so that the brix have easy access to it
redis cache update tests with nodeResults.  comment cleanup
remove unnecessary comment
Merge pull request #20 from lbondaryk/549_noderesults_and_friends

549 noderesults and friends