iOS autoreleasepool changes - Changes for #2808
Minor typo fix.
iOS-VideoGrabber Fixes

-Fixes for iOS revisions less than 7.
-Now builds against SDK levels lower than 7
Merge remote-tracking branch 'upstream/master' into iOS-VideoGrabber-Fixes2
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
Merge pull request #3031 from admsyn/fix-deprecated-startthread

use non-deprecated startThread in ofOpenALSoundPlayer
Merge pull request #2947 from danoli3/iOS-VideoGrabber-Fixes2

iOS-VideoGrabber Fixes
removes assimp lib from libs ( duplicate ) closes #3025
Merge pull request #2888 from danoli3/iOSAutorelease

iOS autoreleasepool changes - Changes for #2808
add missing left alt key release in events example
Merge pull request #3032 from admsyn/fix-left-alt-events-example

Add missing "case" for left alt key release in events example