New config options
Prepared cpu load average thread
MemoryWatch now uses a map<string, float>, we had some problems with lexical_cast.
Continue if we got an empty line in MemWatch
Clear map after each iteration
Added a method to MontorWorker Class that creates a named pipe and listens to it while the watch threads are running.
This can be used to safely exit servermonitor.
Catching some boost specific exceptions

Signed-off-by: Christian Rapp <crappbytes@gmail.com>