Only burn the building if still in level
Images in proper directory

Weapons belong in the weapons directory and NPCs belong in the NPC directory.
Don't burn any building tiles if player leaves level
Merge pull request #2223 from niamu/images_cleanup

Images in proper directory
Merge pull request #2217 from niamu/burn_building_fix

Only burn the building if still in level
Merge pull request #2226 from hawkthorne/master

Bug fix