ofGLReadyCallback() updated

Updated ofGLReadyCallback() to fix crash on check for GLSL version when the OpenGL context version is < 2.0.
Update to ofGLReadyCallback()

Changed ofGLReadyCallback() to check for null pointer of GLSL version string instead of checking OpenGL version and proceeding from there.
implement setSpeed in ofxiOSVideoPlayer
feature: added ofxiOSGetDeviceInfo which returns an object which contains type, device string and major and minor versions of the device. Relates to #2872
Merge remote-tracking branch 'upstream/master' into iOS-VideoGrabber-Fixes2
add changelog note for ios video setSpeed()
updated tess2 for iOS 7.1 SDK and 64 bit, fixes #4; create LIBS_DIR if it doesn't exist; fixed readme typo
Merge pull request #34 from danomatika/master

updated tess2 for iOS 7.1 SDK and 64 bit
emscripten port
compile.core.mk: fix core clean target
add emscripten makefile config
addons .gitignore for emscripten
Fix the problem that frame rate becomes slower than the specified value.
OSX Retina Mouse Input Fix

Fixes mouse pressed and mouse released events being scaled incorrectly.
https://github.com/openframeworks/openFrameworks/issues/2998

Problem was the Mouse Moved and Mouse Dragged events were already
scaling the X,Y positions to the retina pixel level. This led to the
Mouse Pressed and Mouse Released events polling that already scaled
position and then multiplying that by the screen scale again.
install_dependencies debian & ubuntu, gtk3 package was wrong
Merge branch 'master' of github.com:openframeworks/openFrameworks
kiss_fft.h: reaklines
Merge branch 'master' into feature-emscripten
ofTrueTypeFont: initialize all members in constructor
Merge branch 'master' into feature-emscripten