MAVez 3.5 - Timesync functionality

This release adds support for the MAVLink timesync protocol.

A bug was also fixed where coordinates already in integer degE7 were being multiplied by 1e7, resulting in incorrect degree representations. The coordinate constructor now determines whether a given input is in degrees or degE7 along with the provided use_int flag before converting. It will also now convert degE7 to degrees if use_int == False.