Whitespace
Improved error message for category_generator plugin. Addresses #116
Fixed blockquote plugin (author alone would not show up without title)
Striped whitespace from titles in blockquote plugin
Video tag plugin now supports mp4,ogv,webm formats, closes #931
setup_github_pages: allow for clones missing .git extension
Removed unnecessary passive group from octopress origin regex
improved regexes for setup_github_pages task
Added a post_url.rb file as a plugin to fix internal linking issues.