Speeds up space movement a little bit

Space slowdown is now 1.5 (same speed as a fat person in the station).
Jetpacks will speed you up by 2.5 (which, assuming you aren't slowed down by anything, gives you -1, which is the old space speed) and everything else is unchanged (including the slowdown for having stuff in your hands).
@MrPerson 
This is being slightly slowed down with this change, stopping 0.5 of the move delay from being removed.