Conflicts:
	engine/src/chaserrunner.h
	engine/src/function.cpp
	engine/src/function.h
	engine/src/rgbmatrix.cpp
	engine/src/scene.cpp

* Chaser: save duration mode
* ChaserStep: fix fromVariant
* FunctionTimings: restore "Duration" loading

Rename timing to speed

Add Function::speeds() and Function::speedsEdit() to get/set speeds

Add -std=c++11 to get the float utils

* Fix merge issues
* Add alternateSpeed* in function implementations

overrideSpeeds is an override of m_speeds
it is not an alternate speed

* RGBMatrix: done
* EFX: todo
* Chaser: todo

also:
* add innerSpeeds/commonSpeeds helpers
* alternateSpeedsEdit now returns a FunctionSpeedsEditProxy

EFX done

chaser done
sequence todo

sequence done

* move tempo tests from function_test to functionspeeds_test
* fix speed beatsToMs utils

legacy VCSpeedDialFunction (without alternateSpeedsIdx)
are loaded as inner speeds for chaser, efx and rgbmatrix

In order to be able to use outer speeds,
the elapsed timer should be kept unreseted from
the start of the function.

Add roundTime() and roundBeats() helpers
to keep track of time in the current step.

overrideSpeeds override outer speeds, not inner speeds
-> the issue caused by mcallegari#699 is fixed

This is now overrideSpeeds()

* use Q_GADGET instead of Q_OBJECT macro to allow the use of Q_ENUM
* renameAttribute is public

* old "totalDuration" is now "audioDuration"

* Chaser::totalDuration is renamed to totalRoundDuration

Use EFX innerSpeeds, like it was done before

Restore RGBMatrix::totalDuration() as totalRoundDuration()

* Function: add totalRoundDuration(), formerly totalDuration().
** totalRoundDuration() is the duration of the function
   if run in "one shot" mode.

* Speed: rename switchTempoType to setTempoType to match with
  FunctionSpeeds::setTempType

* Update calls to Function::fadeInSpeed() and friends