Onboard kinematics 'M' move_to and 'T' move_to_straight commands accept only integer orientation values

[JamesNewton]

While parsing the values for the orientation in movements using onboard kinematics, the my_dir and my_dir_end vectors were being taken as integers instead of floats. Thank you Edgaras for reporting this issue!

This has been corrected by the following update:

https://github.com/HaddingtonDynamics/Dexter/commit/5900820df553f8c5df0e71928b9b46827b642c9b