fixed broken ifdef around timespec definition (for Win32 builds)
improved timestamp sample
added useful comments to net_io.c to help determine which code path is which size (client/server)
implemented transmission of timestamp information to network clients
added a simple connection test, reports useful stats on reliability
improved unix build process - reduced time by about 15%
fixed a potential memory leak
added a fflush() to log calls, just to make sure that the ordering is correct
improved performance when locating a frame ID
fixed a corner-case where timeouts occur prematurely if the packet transmission is delayed
rescued xbee2 'sensor' conType from xbeeZB_old branch (not sure why it was only there...)
updated documentation for 'new' sensor conType
Merge branch 'master' into xbeeZB_old

Conflicts:
	net_callbacks.c