Initial commit of Alarm command class
Update converter class to add Alarm converter
Initial test version
ZWave: Improve node Heal State information

Allows storing of the Heal State information in XML if the heal Failed
or Done.
Restores the Heal State string on startup
Update debug messages
Change LastHeal to use NodeState

Returns IDLE instead of NONE when no previous Heal information.
Simplifies code
Merge pull request #1536 from cdjackson/zwave-alarm

Zwave ALARM class implementation
Fix LastHeal state

Fixing as per Chris' suggestions
Merge pull request #1523 from wezhunter/zwave-improve-healstate

ZWave: Improve node Heal State information