E2: Added E:constraintBreak(s, e), for more precise removal
E2: Added E:constraintBreak(e)
Renamed E:constraintBreakAll() -> E:constraintBreak()
Fixed E:constraintBreak(s) always doing welds, oops
Hoverball rewrite

Rewrote from scratch to clean up code.
Fixed a problem where the strength option was ignored on spawn, and only
used on update or dupe (Thanks to Franc[e]sco for reporting this
problem)
Made glow sprite larger (it was there, but too small to see, before).
Renamed inputs/outputs, used the new alias feature to keep old dupe
compatibility.
Added Position and Distance output.
removed on state saving from thruster

There is no reason to save a thruster's on state because whatever you've
writed the thruster to will take care of that
Updated glow to match garry's

Glow becomes bigger the further away the hoverball is from its target
height