migrate to AVFoundation API for Audio Sessions
handle audio interruptions in ofxiOSSoundPlayer
properly set the audio category on iOS 5
feature glfw multiwindow fullscreen for windows
add feature allowing iOS sound to mix with other apps
closes #878
remove stray call to C AudioSession API
Merge pull request #2187 from admsyn/ios-sound-futureproof

AVFoundation API for iOS Audio Sessions
Merge branch 'develop' of github.com:openframeworks/openFrameworks into bugfix-glfw-fixes
glfw bugfix fulscreen for windows
Merge pull request #2211 from openframeworks/bugfix-glfw-fullscreenFix

Bugfix glfw fullscreen fix
fixes ofDrawBitmapStringHighlight issues

fixes an issue wherein the background rectangle would not be drawn at the correct position.

Note that the programmableGL renderer is more faithful in drawing the bitmap String since it uses the new internal ofMatrixStack to calculate the on-screen positions.

Closes issue #2212

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
removes unused matrix

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
Merge pull request #2215 from tgfrerer/fix-drawbitmapstring-highlight

fixes ofDrawBitmapStringHighlight issues
optimises matrix ops

this gets rid of one GL matrix operation + one unnecessary gl state change for any ofDrawBitmapStringHighlight draw operations which are not OF_BITMAPMODE_MODEL

Signed-off-by: tgfrerer <tim@poniesandlight.co.uk>
Merge pull request #2216 from tgfrerer/fix-drawbitmapstring-highlight

ofDrawbitmapStringHighlight: optimises matrix ops