Adding support for more telldus features

Added support for DeviceEvents and SensorEvents. Changed build to use
GYP.
Changed some JS key names to make more sense.
tabs -> spaces.
Added support for tdRegisterRawDeviceEvent()

Added support for tdRegisterRawDeviceEvent()
grr. tabs -> spaces.
Simplified callbacks.
Fixed loading telldus library in linux.
Merge pull request #4 from marchaos/master

Added support for device and sensor events