v0.2.5

* Fix flexbox-related property value parsing (Mark Lee)
* Support simple blocks in functions (Douglas Christopher Wilson)
* Update package.json config (Nick Schonning)
* Ignore NPM debug logs (Nick Schonning)
* Update repo URL for Travis badge (Nick Schonning)
* Add support for the CSS3 sizing spec (Mark Lee)
* Parse quoted and unquoted uri @imports. Fixes #108 (Terin Stock)
* Allow @viewport to be inside of @media (Derk-Jan Hartman)
* Fix test task (Tunghsiao Liu)
* Update viewport unit (Tunghsiao Liu)
* Add support for animation-fill-mode (Michael Stämpfli)
* Allow underscores in identifiers (Michael Mattiacci)