Adding parent Blog tag to post layout

Yandex.Validator require parent element, I don't have a point not to add it http://webmaster.yandex.com/microtest.xml
Remove obsolette pubdate

Info [here](http://wordpress.org/support/topic/pupdate-validation-issue) and [here](http://stackoverflow.com/questions/16101472/attribute-pubdate-not-allowed-on-element-time-at-this-point)
New meta to Blog markup
New meta to Blog markup
New meta to Blog markup
New meta for Blog markup
Removed incorrect rel="full-article"
Merge pull request #28 from paskal/master

Adding parent Blog tag to post layout