changes to the alarmdecoder binding:
- added feature: can now send commands to alarm panel with openhab configuration "send_commands_and_compromise_security"
- fixed bug with parsing keypad messages that contain comma in the message string
- cache state to cut down on update messages going across the openhab bus
Merge pull request #1638 from berndpfrommer/alarmdecoder

[Alarmdecorder] added SEND feature and fixed bugs in the alarmdecoder binding