exercism/xrust — pull request #8 by pminten (2014-04-20 17:14:32+00:00)
Title: Update rust exercises for rust 0.10

Also allow `_test/check-exercises ` to run a specific test.

I've changed some approaches where it seemed sensible to me.

A review would be appreciated, I've only started learning Rust two days ago and am quite unfamiliar with its idioms.