Initialize delay to 0 (it was initialized to 100ms -- oops).
Get cross.png from the resource bundle instead of the resource path.
Make StatsManager announce stat updates via a signal.
Add StatModel, a QAbstractTableModel for representing a list of stat objects.
Add ControlModel, a QAbstractTableModel for representing a list of controls.
Add DlgDeveloperTools, a dialog with various useful debugging tools.

* A controls tab where you can see and edit Mixxx's controls directly.
* A stats tab where you can see the stats (e.g. average soundcard callback
  durations) that Mixxx tracks in realtime.
* A log tab where you can see the Mixxx log without having to go find it on the
  filesystem.

The tables are set to update at 2FPS which seemed like the right balance between
CPU overhead and interactivity to me.
Add a Developer Tools option to the Developer menu. Now we're cool like Chrome :).
Set the log text view no-translate.
Merge pull request #151 from illuusio/opus

Add Opus SoundSource to Mixxx
Merge pull request #118 from ninomp/waveform_renderer_rgb

RGB waveform display
Add --safeMode command line flag that disables risky things.

* Automatically loads EmptyWaveform.
* Disables spinning vinyl widgets.
* Disables synchronization polling.
* Doesn't open controllers by default.

This should hopefully be a remedy we can offer to users when they say Mixxx
crashes at startup or if they get their settings stuck such that they can't boot
Mixxx.
Don't leak visual_key_distance and some minor WKey cleanups.
Roll over logfiles
fix merge conflicts - recording_time & master
remove qtime logic from dlgrecording - add counting of samples
Set device category for MIDI controllers.
Fix some usability issues in the controller preferences page. Bug #1304964

* Use a tab widget instead of a toolbox.
* Move troubleshooting link to the support link list.
* Move MIDI learn button to controller info header.
* Add more edit triggers to the input/output mapping tables.
Vinyl seek should always be seekExact
Avoid hammering ->get() calls in wspinny.
Remove unnecessary check