escape smo content
Update thanks file
Manually escape SITENAME
Manually escape next and previous post links
Manually escape title of articles and pages
Manually escape description of articles and pages
Manually escape related posts
Move twitter:creator meta tag to base.html
Add SMO to archives page
Add SMO to tags page
Move og:type and twitter:card into base.html because it is repeated without any change in every file
Add SMO to categories page
Add SMO to search page
Add support for Google Universal Analytics
Update release notes
No need to use GOOGLE_ANALYTICS_SITE_URL in Universal Analytics code

According to
[documentation](https://developers.google.com/analytics/devguides/collection/analyticsjs/method-reference#create)
third parameter is optional.
Merge branch 'master' into calf