fix inbox for loop iteration
initial code changes for returning username in poll()
pushing for debugging, currently getting a 404 on the new route
added integration test
inbox.getAllMetadata works and tests pass
undo of crypton.js script path in key-exchange app
removed comment
added a few more checks to the inbox metadata test
updated method comments with new name/description
updated getAllMessages SQL query to return usernames, also added numBytes to metadata query
removed lesson refs from key-exchange example
Merge pull request #321 from daviddahl/inbox-tweaks

Inbox tweaks: better metadata handling, peer username now works