Torch fixes [SEE DESC]

* Torches snap to neighbour when placed on bottom
* CanBeAt takes into account cobblestone walls
+ Used more BLOCK_FACEs instead of numbers
Fixed friction for entities

Due to a misplaced else, other entities weren't getting friction
Fixed derpy comparison
Merge pull request #172 from tigerw/bugfixes

Fixes to torches and entities - because they were derpy zubzubs.