Rewritten about page with headings. Fixed git hub link.
Merge branch 'about-page'

About page has been rewritten and the git hub link has been fixed.
Added Big Red Button to start counting cells
Changed css tables to a definition list of type dl-horizontal. Removed changes to cellcounter.css.
Merge branch 'new-about'
Merge pull request #175 from DeckOfPandas/master

Tidied styling and text of /about and index page by @DeckOfPandas