Version 0.12.0

Merge pull request jekyll#97 from jekyll/release/0.11.1

Release: 0.11.1

Version 0.11.0

Version 0.10.2

Version 0.10.1

Version 0.10.0

Version 0.9.0

Version 0.8.1

Version 0.8.0

Version 0.7.0