(PhVideoEngine) Remove frameIn() method

In preparation to switch from frameIn to timeIn in the videoEngine
(PhVideoEngine) Switch the video engine to PhTime

This fixes another bunch of strip delays with 23.976 fps videos
due to back-and-forth conversions between frames and times in the
engine.
Fix tests following removal of PhVideoEngine::setFrameIn
Fix VideoTest following removal of PhVideoEngin::frameIn and frameLength
(PhVideoEngine) Handle undefined framerate, default to 25 fps
New spec to test default framerate of the video engine
Include the deploy steps for specs

This is necessary on Windows to copy the appropriate dlls.
Fix segmentation fault in VideoSpec

A closed video engine was called after being closed through a
signal/slot connection...
(PhVideoEngine) Fix conversion between PhTime and FFMPEG timestamp
Merge pull request #279 from tlecomte/tlPhTimeInVideoEngine

Use PhTime in PhVideoEngine