Various improvements

Moved mw-import to a more logical location (and updated)
Implemented better flow-(click/editable)-interactive design (ref board header)
New formElement helper and form_element template
Timestamp helper corrected, and implemented dynamic autoUpdate for “n ago” dates
Added mw-ui-flow.less for potential mw-ui additions and improvements
Merge branch 'master' of github.com:shahyar/wmf-flow1