ofSystemUtils: fix text alert on linux
Merge pull request #2964 from tgfrerer/fix-getCurrentMatrixWarnings

Fix get current matrix warnings + allow query current Orientation Matrix
ofURLFileLoader: fix shutdown sequnce. Closes #2588
Merge branch 'master' of github.com:openframeworks/openFrameworks
ofImage: convert image type if it's different than PixelType. Closes #2965
add changelog note for ios video setSpeed()
reduce QTKit deprecation barrage to single warning
replace deprecated glut window carbon code
Merge pull request #2966 from admsyn/reduce-warnings-osx

Reduce warnings on OSX
CHANGELOG for osx warnings
linux: fix system dialogs
ofGstUtils: close pipelines properly by sending and waiting for EOS
Merge branch 'master' into feature-documentation

Conflicts:
	libs/openFrameworks/utils/ofUtils.h
fix incorrect signature for ofToDataPath()
Merge pull request #2914 from openframeworks/feature-documentation

Initial progress on documentation of ofUtils.h.
Clean up documentation of ofImage member variables.
Clean up grammar and spacing for ofThread.
Fix doxygen format.
Further cleanup and clarification of ofImage documentation.
fix for ofSetDataPathRoot method signature.