Whitespace
Merge pull request #936 from richo/cleanup/whitespace

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 travis.yml so travis doesn't fail for every master branch PR and push
Added travis stamp of approval to README.
Merge remote-tracking branch 'octopress/master'

Merging upstream changes from Octopress master branch.