Merge pull request #27 from jpumc/16

Fixed MobGrinder NPE
Beginnings of Gas API
Finished Gas API. PRs/improvements are welcome
Fixed sintering oven/furnace having opposite textures
Fixed random flame/smoke particle flickering with Sintering Oven usage
Merge remote-tracking branch 'upstream/16' into 16
Merge branch '16' of https://github.com/jpumc/Electrodynamics into 16