some friendly updates to TechRacer

turns out IOResult is actually IOResult() - a function that clears its result after each call

oops, fix logging. had = instead of <> in an error check

*sigh*

stricter skip

Limit fire particles speed to 2

fix for issue #840: Basic Training - Grenade is failing to dismiss team

expose FlightTime to lua, disable in-air flame harming moving hogs ☹ aaaand override that in ClimbHome ☺

don't forbid running regular chat commands during turns of other teams. that was probably only meant for emotes to begin with

delay cake boom until it has walked a little bit. also fix accidental drowning of watergods in last commit