Remove logging. Fix issue with resting ('.')
Allow zapping while floating. Optional realtime

FEATURE: Can shoot lasers while flying.
FEATURE: Realtime mode. This is effectively a minimum game speed where
if you don't use your turn within 300ms, it is forfeit. The game still
pauses when waiting for action details (ie choosing laser direction).
You can disable this feature by setting REALTIME = false at the start of
the file.
CODE: Timeout added to waitForKey. If no valid key is pressed in that
time, specified default behaviour is executed.