more node api fixes
Enable returnbody as a param for PUT
This lets us immediately load the data as saved.
At the moment riak doesn't seem to recognize or
parse items with the content type application/json
As a follow on, we need to recognize and set it
so we can use it for data storage.
Updating due to changes in node HTTP client
rough in walk multipart parsing
cleanup code and tests slightly
add rudimentary walk() method
add basic support for r/w/dw parameters to fetch and store
Basic initial version of Riak client for Node.js