ubuntutools/lp/udtexceptions.py:
- Add new public functions that expose features from LP API
- Modify isLPTeamMember to use LP API
* requestsync
- Use new functions to check if user can upload requested package directly
instead of checking team membership
- Default to current development release if no release is specified on
commandline
* buildd
- Check if user has upload privileges instead of checking for team
membership when seeing if operations are permitted
