moved compiled tests to lib
Switched to using promises
added OSDb hash calculation logic
Updated README
added test for binary file
switched from createReadStream to manually reading chunks

Had the same issue as described here http://stackoverflow.com/questions/14015757/createreadstream-multiple-times-on-the-same-fd
tests for file size, async compute and notify
support for progress notification
added support for node style computeAsync
updated instruction
build for initial release