Merge pull request #19 from bvssvni/master

Upgraded
Fixes deprecation warning for find

Fixes #20
Merge pull request #21 from leonkunert/master

Fixes deprecation warning for find
Added link to how to contribute

See PistonDevelopers/piston#715
Fixed build.
Updating to latest nightly
- Removed image trait import that broke hematite build
Merge pull request #22 from tjkierzkowski/master

- Removed image trait MutableRefImage import that broke hematite build
Added metadata to Cargo.toml, renamed package

* Upgraded to latest piston-image