YUV working for gst + pixelFormat use for ofPixels
Merge branch 'feature-YUV' of /media/arturo/elements/openFrameworks into feature-YUV
ofGLUtils: fixes for gles
ofPixels: removed channels variable, all allocations based on pixelFormat
Merge branch 'develop' of github.com:openframeworks/openFrameworks into feature-YUV
Merge branch 'develop' of github.com:openframeworks/openFrameworks into feature-YUV

Conflicts:
	libs/openFrameworks/video/ofGstVideoGrabber.cpp
Merge branch 'master' into feature-YUV

Conflicts:
	libs/openFrameworks/graphics/ofPixels.cpp
	libs/openFrameworks/graphics/ofPixels.h
	libs/openFrameworks/utils/ofConstants.h
	libs/openFrameworks/video/ofGstUtils.cpp
	libs/openFrameworks/video/ofGstVideoPlayer.cpp
	libs/openFrameworksCompiled/project/linuxarmv6l/config.linuxarmv6l.default.mk
	libs/openFrameworksCompiled/project/makefileCommon/config.linux.common.mk
	libs/openFrameworksCompiled/project/makefileCommon/config.shared.mk
Update signal handling
- Pass user readable signal name string.
- Pass signal number as exit code w/ std::exit()
- Change global signal handler name to ofSignalHandler().
Tabs to match local code style.
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
Merge branch 'master' of https://github.com/openframeworks/openFrameworks
fix deprecation msg in ofShader

use iterators instead of deprecated ofBuffer line methods
Fixed numerous issues and added locking

Added thread locking, fixed getPosition, setPosition, unloadSound and proper OpenAL error fetching.
add half float gl types

adds support for 16 bit GL channels to ofGLUtils
Merge pull request #3174 from tgfrerer/fix-ofShader-deprecation-msg

fix deprecation warning in ofShader
ofShader: fix for unordered_map on visual studio
ofBuffer: remove unimplemented method