Merge pull request #6 from bvssvni/master

Upgraded to latest Rust-Empty
Change *T to *mut T or *const T as applicable

Bare *T has been deprecated in favor of explicit *const T and *mut T.
Change these types to fix compilation on recent rustc versions.
Update to latest rust-empty

Fixes compilation on recent rustc.
Merge pull request #7 from cyndis/master

Fix compilation on latest rustc
update to last Rust
- crate_id -> crate_name
fix travis build
Upgrade to latest Rust-Empty