Auto merge of #47 - servo:bump, r=glennw
Auto merge of #47 - servo:bump, r=glennw

Bump version to 0.2.1

In order to pick up this change:

https://github.com/servo/core-graphics-rs/pull/46

<!-- Reviewable:start -->
[<img src="https://reviewable.io/review_button.png" height=40 alt="Review on Reviewable"/>](https://reviewable.io/reviews/servo/core-graphics-rs/47)
<!-- Reviewable:end -->

servo/core-graphics-rs,pcwalton/rust-core-graphics