Merge pull request #108 from bvssvni/master

Upgraded to latest Piston + Gfx + Rust
updating dependencies and changing nbt so that it builds.
Merge pull request #109 from saml/master

updating dependencies and changing nbt so that it builds.
More consistent naming of NBT types
Merge pull request #112 from saml/master

More consistent naming of NBT types
Updated, added profiles to Cargo.toml