Added in chance to dodge normal attacks, fixed player dodge rolls
Added dodge xp, removed broken dodge system.
Made physical specials use melee skill (bite/tentacles)
Fixed if/else's and dodge_roll.
Added XP gain for dodging special attacks.
This will never trigger.
melee_skill (DEX) should be used for grab chance.
Fixed else if.
Finalized version

New curves! % Data may be found at http://pastebin.com/qLhRyjGF.
Experience gain buff

Some more playtesting shows that leveling up in the dodge skill is still
rather difficult. This generally buffs experience gain, the end result
should be slightly faster growth then the old code.
Let ammo be specified in the JSON raws
Moved ammo defs to json raws
Move gasoline to json raws
Fix types and ammo_types
Fix up item descriptions
Set phase for gasoline to liquid.

Requires pull request #939 or #941 to function.
Fixed two warnings
simplify and fix map::has_adjacent_furniture
fix parentheses in game::explosion
Change bullet explosions to use ammo_type instead of recasting every step.
This seems to fix a crash that happens when the explosions destroy a wall that
collapses onto the tile containing the exploding bullets. See #679