Updated the readme with some more Visual Studio reqs.

Enable parallelized compilation on Windows

Added an 11th joystick button to the joystick widget

Fix transmitting pitch and roll from the joystick

Joystick messages were being transmit due to a signal/slot mismatch.

Add unistd.h in libs/thirdParty/qserialport/src/posix/qserialportnative_...

Without this change, the program can not be built on Linux.

error otherwise.

Added an 11th button display.

transmit properly.