add-comment
rotation below -99 didn't display, just froze
drop decimal places for rot/trans in UI
nonsense
submit mapped data to filter, not raw
gcc too much a piece of work often

Issue: #81
add ui layouts for legibility's sake
show exact slider value in now-read-only spinboxes.
default to 1:1 lienar mapping

Issue: #46
No time to implement a kitchen sink

Issue: #65
don't reduce usleep at ms granularity pointlessly
Merge commit 'f78b96a' into unstable

* commit 'f78b96a':
  gcc too much a piece of work often
  submit mapped data to filter, not raw
  nonsense
  drop decimal places for rot/trans in UI
  rotation below -99 didn't display, just froze
  add-comment
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
[ANN] opentrack-2.3-prealpha-20141018_1

- output axis selection from input for each tracker, no need for
  per-tracker support anymore.
- settings, including mappings, take effect immediately -- that
  is, before OK pressed. pressing cancel reverts them as usual.
- ui mildly redesigned
- pitch +-180 allowed, EZCA mode gets the knife
- ypr xyz all default to linear 1:1 0->180 mapping for new configs
- FreePIE UDP receiver tracking source support
- PT tracker dynamic pose resolution removal, it never worked right
- aruco tracker even better than before
- kalman and ewma filters improved and continue being improved
- maintainability updates, including better functionality you
  don't notice

- bugs that were reported on github issue tracker were fixed
cmake: use one macro invocation for adding to build