changed how fire works

-fire switched to release energy by burning fuel and generating heat from that
- reorganzied the fire process in a saner manner
changed variable settings for the change in fire.dm

added one new variable
deleted three variables that are no longer used
readjusted composition of syndie bombs

set them to produce a 1-2-5 explosion for the fire changes
Remove mordeth221 from custom sprites list until his sprites are ready and in.
Merge pull request #3251 from Ravensdale/master

Custom sprite quickfix
Modtype tweak.
Merge pull request #3246 from LordBraindead/bleeding-edge-freeze

rewrite of fire code - second attempt
More fixes.
Nice colours (and a minor bugfix)
Stage 1: deconstruction.
Part 2: construction.
Part 3: fixing shit
Merge pull request #3253 from Spamcat/signs

Signs
Merge pull request #3252 from Segrain/bleeding-edge-freeze

Examining cyborgs.
Merge pull request #2 from Baystation12/bleeding-edge-freeze

Bleeding edge freeze