Fixed output data of the author (news, kb)

Fixed output data of the author in the news and the knowledge base. Now
template can obtain additional information about the author.
KB:: Tags Cloud

1. Added the ability to affix tags in articles by adding, editing
articles via admin panel.
2. Added ability to display tags when viewing an article.
3. Added ability to display all the tags when viewing categories
knowledge base.
4. Added ability to display all the tags when viewing all articles in
this category.
Minor changes in the code and templates.
KB:: Issue #4

1. Added ability to display pages with a particular tag.
2. Changed output additional information when viewing the article,
including tags.
3. Changed output tag cloud.
4. Changed output a list of categories knowledge base.
News :: bug fix

Function not working correctly check the amount of news.
Issue #16
Resolve issue #17
fix markup_helper
Merge pull request #19 from lumian/develop

ITcms update to 0.3.0