Release new version

[Alex Morega]

rust-wkt 0.0.3 depends on rust-geo 0.0.2 which does not compile on Rust 1.1.0 (stable):

.../.cargo/registry/src/github.com-1ecc6299db9ec823/geo-0.0.2/src/lib.rs:1:1: 1:18 error: unstable feature
.../.cargo/registry/src/github.com-1ecc6299db9ec823/geo-0.0.2/src/lib.rs:1 #![feature(core)]