fix options singleton duplicating itself on win32
aruco: fix typo breaking red only CCD mode
timer: start() has to return elapsed before exiting

Reported-by: @brokenhands
Issue: #79
Breakage-of: pt-tracker
nix PT opening zeroth camera in case >0th camera used

Reported-by: @brokenhands
Issue: #79
Breakage-of: pt-tracker
nix video frame layout at startup or else no feed from tracker

Reported-by: @brokenhands
Issue: #79
Breakage-of: pt-tracker

Trackers like PT expect no layout for the QFrame initially. It's always
been like this.
fix ypr when translation-compensating