Xbee Test updated with new outputs
Set Xbee Channel into program mode. Tried to make the Send and Recieve dest address working. I was unable to get it to work.

I also setup XBEE_1 #defines
Added new GPS test data and figures. Also, logbook instructions.
Ready to add console window to gui.
Set up Dest and Source addresses
Merge branch 'master' into xbee
Initial Sonar code
Finished gui, but one bug crashes.
Possibly fixed crashing. Added file menus and removed locks.
Changed terminal color.
Merge branch 'xbee' into sonar
Sonar Compiling
Finished gui and packed in exe for win.

Need mac app, and need icon in tkinter.
Added LCD datasheet and renamed encoder uncertainty to old.
New GPS convergence data.
Finished non-bundles serial_logger, and fixed gps record test to be more robust.
XBee Test now compiling, renamed messages.
Fixed gps record test to record timesteps.
Fixed gps record test time stamps.
Fixed gps record test time stamps.