Merge pull request #1 from tigerw/bugfixes

Bugfixes branch merge
Merge pull request #2 from tigerw/bugfixes

Bugfixes
Fixed a fire simulator bug

Fire now doesn't stay when it isn't on a flammable block.

Fixes the "fire creates chandeliers" bug in report #131
Fixed issues
Merge pull request #199 from tigerw/moar-bugfixes

 Fixed a fire simulator bug