Made compliant with Play 2.1 release
updated the libraries to play 2.1.1 (sbt versions)
updated version
added the query params so the request will sign properly (for multipart requests)
slight refactoring, added functions for initiating multipart upload
implemented scaffolding for the rest two calls
implemented the function calls for uploading part
fixed the query params string generation
Implemented the functions for completing upload
completed documentation