Added package for login screen
Added login feature with tags; tags now sent to server when requesting metadata
Merge branch 'master' into restricted-streams to update with bug fixes
In this commit:
1) Updated simulator to share stream metadata selectively.
2) Fixed bugs in stream tree and in permalink as a result of previous changes.
3) Ensured desirable behavior when logging in and out with streams selected
4) The updated metadata.py is still in the uPMU-daemon directory. It will be moved in a future commit
Added the updated metadata.py to this repository (it's more relevant here). Fixed some final bugs introduced with the "real" metadata forwarder.
Made metadata program read from a file; provided tagconfig.json as an example
Made Meteor store account info in a file that can be updated to change it
updated example files and added information to README