Added a simple union/struct combo for defining the message data from KVH
data. As currently implemented, would be HIGHLY dependent on the
endieness of the host system. We're probably going to have to change
this significantly with a bunch of compile-time checks against the
system (probably in a full class implementaiton) to seperate it from the
underlying system more.

#11
Merge branch 'development' of https://github.com/RIVeR-Lab/kvh into development

Conflicts:
	kvh_driver/include/kvh_driver/kvhmessage.h