heartbeat RPM package for Red Hat / Fedora / Aurora

heartbeat is a basic high-availability subsystem for Linux-HA.
It will run scripts at initialization, and when machines go up or down.
This version will also perform IP address takeover using gratuitous ARPs.
It works correctly for a 2-node configuration, and is extensible to larger
configurations.

It implements the following kinds of heartbeats:
	- Bidirectional Serial Rings ("raw" serial ports)
	- UDP/IP broadcast (ethernet, etc)
	- Unicast heartbeats
	- "ping" heartbeats (for routers, switches, etc.)
	   (to be used for breaking ties in 2-node systems)