Fix extra parenthesis.
Add a Makefile to simplify common tasks.
Renamed caffeine->caffeine-ng in the GUI.
Remove broken flash detection.

The flash detection mechanism was broken and not really fixable: flash works
differently now (especially PEPPER-based flash), so this code needs to be
rewrittn, rather than fixed.
Code cleanups and import organization.
Fix import race condition.
Use docopts for parsing cli arguments.