Add code to implement keep alive notifications sent to 
systemd.
Added commands to restart HouseMonitor if the watchbog timer expires.
OPEN - task 46: HouseMonitor died with an out of memory error. 
http://github.com/gary-pickens/HouseMonitor/issues/issue/46
Added a call to sd_notify and restored some code in build.xml(it still
does not work -- enable systemd still causes the system to hang)