Permanently delete files in Dropbox by deleting their content
Fix method store_fileobject() in class DropboxStore needs to return metadata for the stored file
Add chunked upload for DropboxStore, to be able to store large files
Add developer provisioning feature
	Update README.rst
	Update tests
	Update Sugarsync.ini
	Update client.py
Add Dropbox provisioning
    update README.rst
    update Dropbox.ini