Merge pull request #136 from bvssvni/master

Upgraded to latest gfx_voxel
Make hematite work with latest rust nightly.
Merge pull request #137 from mitsuhiko/make-rust-nightly-happy

Make hematite work with latest rust nightly.
fps_counter version is updated
Merge pull request #138 from saml/master

fps_counter version is updated
Upgraded

* Still broken in src/minecraft/nbt.rs