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.