Flamethrower fixes.

Fuel now burns, even without an auto-ignition temperature, which was a silly way of doing things.
Mobs no longer ashify since their proc is changed.
Flamethrowers now spread more fuel and burn more consistently for it.
Atoms now have volatility, so they can burn more if they have less fuel.
HOTFIX for some pda terminals not connecting to their vendor account at roundstart
Changes to the Clowncart

- Commented fuel method removed
- Formatting, use span. Stop src. typecasting
- Maximum health is now 1000 (cannot be boosted over this)
- User is now warned if adding more fuel than needed, and the proc
returns
- User is now warned if improving/repairing won't work
- Banana peels now only remove one second of emp stun, banana seeds now
remove it entirely
- Added some visible_message to some actions
- Clarify some messages
- EOL
Changeloged
Merge pull request #2148 from DeityLink/Bleeding-Edge

[HOTFIX] for some pda terminals not connecting to their vendor account at roundstart
EOL.
Fixes the case of the disappearing hatchet.
Merge pull request #2160 from ComicIronic/Hatchets

Fixes the case of the disappearing hatchet.
Merge pull request #2150 from dylanstrategie/Clowncart

Changes to the Clowncart
Attempt a fix to Cultist Secondary Objective, Survive Objective Scaling

- Formula for Cultists needed in the Survive/Escape objective is now 3 +
Total Players/4 instead of a base 5. For the smalles possible rounds (15
players) that's 6 cultists, all the way to highpop (70 players means 15
cultists)
- Some span
- Fix Sacrifice description. You need two acolytes, not three (2 + You)
- Tell people who somehow don't get their talisman to pray, muh
immulsions
- Use pick() func instead of prob when picking objectives to try and fix
the Second Objective cursed code

Addresses #2126 and #451

Proof that the players are okay with hardsauce Cult stuff :
http://strawpoll.me/3158957/r (Favorite option was /4 instead of /5, but
/5 about asks as an average)
Merge pull request #2147 from ComicIronic/FlameThrows

Flamethrower fixes.
Merge pull request #2164 from dylanstrategie/Cult

Attempt a fix to Cultist Secondary Objective, Survive Objective Scaling
Changes the way radio say code is called.
Merge pull request #2166 from ComicIronic/RadioDelay

Removes delay on radio say whisper.
Fix conflicts because git is dumb

Conflicts:
	code/game/gamemodes/cult/cult.dm
	code/modules/mob/living/living_defines.dm