Better exception handling in @async

Also removed unnecessary catching deps exceptions
activity import changes & faster snapshot
preemptive pypi update
Merge pull request #2 from hyprwave/master

Improved handling of exceptions in @async
Merge pull request #3 from jniznan/activity

activity import changes & faster snapshot
minor activity_history fix; and some misc
revert activity_history .lower() changes
committing missing files; glossary and client/cubes/__init__
fixed o_in operator