Set fixed framerate [fix bug #3095]

If a window loses focus in OSX, it no longer receives VSYNC events. If ofSetFrameRate() has not been called, it will no longer be frame rate limited. This can cause unwanted behaviour, such as the application maxing out CPU usage.

See: https://github.com/openframeworks/openFrameworks/issues/3095
Merge pull request #53 from JobLeonard/patch-1

Set fixed framerate [fix bug #3095]
Add CoreVideo to xcode project
Merge pull request #54 from admsyn/fix-xcode-build-corevideo

Fix "_CVDisplayLink..." build errors on OSX
fix syntax error when setting frame rate
Merge pull request #55 from admsyn/fix-framerate-syntax

Fix syntax error when setting frame rate
Merge branch 'master' of https://github.com/ofZach/projectGeneratorSimple into feature-codelite-linux

Conflicts:
	src/testApp.cpp