Decode the unit, house and command codes for X10 messages
Add support for ON and OFF commands for X10 commands received from Insteon PLM.

The module needs some work,  Nothing blocks it from sending Insteon commands to X10 devices.
If the device address is only 1 byte long,  insteon commands like status requests should
be ignored.
Disable commands that are not supported by X10. Some still need some work
the level commands for ex.
Merge remote-tracking branch 'upstream/master'
Merge pull request #13 from gac410/master

Add X10 support to insteon.py