* tc-subtitle is not a sibling to tc-body,
So tc-subtitle needs a clearfix to contains float:right
* add clearfix to all tiddler elements that could contain floats
* add clearfix to tc-tiddler-title in ViewTemplate
* add clearfix to plugin/blog/templates
* add clearfix to plugin/tour/templates
* remove test tiddler
* rename draft title class to tc-tiddler-title-draft
* undo title field covering
* move tc-clearfix to tc-float-right in the base CSS file
* rename clearfix CSS class to tc-clearfix
* update documentation tiddlers
