Merge pull request #117 from bvssvni/master

Upgraded
Merge pull request #119 from bvssvni/master

Some minor improvements
Merge pull request #121 from bvssvni/master

Removed piston dependency
Merge pull request #123 from bvssvni/master

Moved cube.rs and array.rs to gfx_voxel
Merge pull request #124 from bvssvni/master

Renamed `sam` to `sampler`
Merge pull request #126 from bvssvni/master

Moved texture.rs to gfx_voxel
Merge pull request #127 from bvssvni/master

Upgraded to latest gfx_voxel
Upgraded