Adds a new arg to explosion(), flame_range, for fiery explosions! Any mob in that range will be set on fire! Also creates some hotspots (mostly for ambience, won't generate them on existing space tiles) and changes the spawn explosion in the VV tab to let admins make fiery explosions.

Adds a cap for flame_range in global.dm
Added a flame_range for syndibombs, syndieminibombs, Wizard's fireball, fuel tank explosions, and meteors.

Adds firesuit level temperature protection to the wizard hardsuit for safety from your own fireballs setting you ablaze
Adds ExtinguishMob() for Ethereal Jaunt to make wizards a little less vulnerable to fire
Made explosion arguements more readable for the ones with flame_range added to them
flame_range explosions no longer call fire_act() on mobs in the range, but instead spawn a hotspot on them.
Removed flame_range from meteor explosions, reduced flame_range on syndie minibomb, added flame_range to all welderbomb explosions, made args prettier
Merge pull request #1555 from Ergovisavi/fire_explosion

Fiery Explosions! - And some wizard tweaks