urlencode encrypted session token (and urldecode before decrypting)
Merge branch 'develop' of https://github.com/Sage-Bionetworks/Synapse-Repository-Services into develop
from code review
from code review
change token to #!
Merge pull request #332 from jay-hodgson/develop

PLFM-1771: fix registration issue (and clean up old widget descriptors)