Ramp filter when rechaching frequency limits
Moved the diable fading to filteriir and cleaned up the filter effect code
used fading for the moog ladder as well
Bug - Reset pitch when loading new track
Added a checkbox in preferences>interface
If Checked resets the speed slider to default
resolving conflicts
Resolving merge conflicts & updating Pitch with Slider
Update dlgprefcontrols.cpp

Replacing Pitch -> Speed
Introduce Speed instead of Pitch/Rate, to match other place in Mixxx and Manual
https://bugs.launchpad.net/mixxx/+bug/1283190
User Speed term for combined Pitch/Tempo control in ControlPickerMenu
Fix some var names and comments to Speed = Pitch / Tempo
removed unused getPitchIndpTimeStretch()
Playback Speed without Slider
Increase/Decrease Speed
replace pitch-bend with Temporary Increase/Decrease Speed
Add number-of methods to PlayerManagerInterface.
AutoDJ fixes.

* Remove QSignalMapper usage and instead proxy signals from
  DeckAttributes.
* Connect track load / unload / failed-to-load signals from
  BaseTrackPlayer. Lays the groundwork for solving Bug #1396931.
* Add a helpful debug flag for tracing AutoDJ calls.
* Remove PlayerInfo usage from AutoDJ for getting the loaded
  track. Instead, use BaseTrackPlayer itself.
Make DeckAttributes fields private.
Make the tests reflect how real players react to track load requests.
Remove unused variable.
Address review comments.