Force Quit Unresponsive Instruments

The code for this is from rentzsch/ForceQuitUnresponsiveApps.

Fixes appium issue #1306 by ending Instruments if it freezes.

• ForceQuitUnresponsiveApps contains the app that monitors for unresponsive events and ends the process.
• freeze2 contains two test applications. freeze2 will become unresponsive and will not be ended because it's not instruments. instruments is a renamed freeze2 and this will be ended because of the file name.