setDeviceID() must be called before setup() to take effect

Fixes camera selection in inputSettings.xml. Per [the ofVideoGrabber documentation](http://www.openframeworks.cc/documentation/video/ofVideoGrabber.html#show_setDeviceID) setDeviceID() must be called before initGrabber() to take effect.

Also rename ``Settings`` directory to ``settings`` to avoid problems on case sensitive file systems.