Added empty test & openni config file into tests. Fixed a few exceptions
Added new test to check driver cache
Merge remote-tracking branch 'origin/hwmgr_integration_modulemgr' into hwmgr_integration_modulemgr
Merge branch 'hwmgr_config_and_caching' into hwmgr_integration_modulemgr

Conflicts:
	src/main/java/edu/mines/acmX/exhibit/input_services/hardware/drivers/openni/KinectOpenNIDriver.java
	src/test/java/edu/mines/acmX/exhibit/input_services/hardware/HardwareManagerTest.java