openframeworks/openFrameworks — pull request #3097 by akupila (2014-07-22 16:09:43+00:00)
Title: Added support for mouse wheel. 

Implements scroll wheel functionality in GLFW. Seems a bit too straight forward, not sure why this wasn't already in master.

__Only tested on OS X 10.10__

This enables the following:
```c++
void ofApp::mouseScrolled(float x, float y)
{
ofLog() << "Scroll " << x << "x" << y << endl;
}
```