Dependency: specify css-stringify version
css-stringify>=1.3.0 produce error with twitter-bootstrap.
Fixes https://github.com/rstacruz/css-condense/issues/5
Add tests for @page
Also narrowing css-parse dependency up to 1.1.0
Tests pass.
Merge pull request #6 from gbouthenot/pr-5

Add compatibility with @page css declaration (twitter bootstrap)