optimize images
fixed general statistics Try It
added sameAs microdata
Merge branch 'develop' of github.com:sendgrid/docs into develop
Preparing for the impending Swiftpocalypse
Merge pull request #424 from ws/develop

Swiftpocalypse
combined last_modified and sitemap plugin

because jekyll has no mechanism for dependency management amongst
blugins and further (apparently) changes the order in which it loads
plugins between versions
changed travis version reporting
updated travis url
version update