add addBlobs API function along with support to upload "user" supplied Blobs.  TODO: more testing, readme updates, create 4.0 case to change "file" API function names to reflect the fact the blobs are also possible
readme update progress
update readme & refer to both blobs & filenames where appropriate in the code
update java example to handle blob name param, include commented CORS-related lines
#552 - API function to allow uploading of Blob objects