implement setSpeed in ofxiOSVideoPlayer
add changelog note for ios video setSpeed()
ofThread: detach thread on stop if it's not being waited. Closes #2506
ofThread, change order of flags and detach to avoid potential problems
refactor window should close commit to avoid dependencies from ofEvents to GLFW
ofParameter(Group) fix polymorphism on parameter groups
added left alt key detection to events example
added CoreVideo for new glfw lib
bugfix for ofxiOSImagePicker crash on exit. code cleanup. switch to using ofPixels. ofxiOSImagePicker example updated. closes #1730
add keycode, scancode and codepoint to ofKeyEventArgs
Merge branch 'master' of github.com:openframeworks/openFrameworks
added function ofxiOSImagePicker::clear to clear the internal ofPixels buffer.
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge pull request #2961 from admsyn/fix-ios-implement-video-setspeed

Implement setSpeed in ofxiOSVideoPlayer
CHANGELOG: glfw and key events changes
Merge branch 'master' of github.com:openframeworks/openFrameworks
ofXml: fix crash on empty document
small bugfix for GLFW drag drop callback for retina screens. Closes #3023
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
non-deprecated startThread in ofOpenALSoundPlayer

fixes #3029