Mouse flight is toggled with right click
Some refactoring
Custom mouse cursor for GUI and game drawn from a PNG cursor file at native resolution.
two new pointer icons
Added second mouse cursor for flight mode.

Mouse resets correctly when switching views.
Halved mouse control rotation
Merge branch 'mouse_control' of https://github.com/ParagonDevelopmentTeam/pioneer into mouse_control
Switched to using Paragon's mouse cursors, prettyh 8D
Added configurable deadzone to mouse flight controls
Merge branch 'master' into mouse_control
Added Paragon intro logo