Merge pull request #52 from rurwin/integration

Add API to release the EventStreams to InputEvents.
clouds3d issue patched
Merge branch 'integration' of https://github.com/tipam/pi3d into integration
Get rid of the last of pi3d.util.Log
Merge
Avoid opening an event source that matches two types of device.

Also add PS3-standard joystick movement to Silo.
Merge branch 'integration' of https://github.com/tipam/pi3d into integration