warrior: Update to coroutines. Fix unscheduled callbacks.

Closes ArchiveTeam/seesaw-kit#76
Increase project check freq to 30 minutes from 60.
script: Reword concurrency warnings.
warrior: Handle case were process output is bytes vs str
hq_mock: Fix indents and add a local project
warrior: Add logging.

ArchiveTeam/seesaw-kit#76
warrior: Add reinstall arg to avoid double checking update.

ArchiveTeam/seesaw-kit#76
warrior: Check origin/HEAD not FETCH_HEAD

ArchiveTeam/seesaw-kit#76
pipeline: Print traceback using values given and not sys.exc_info

Closes ArchiveTeam/seesaw-kit#77