add image and link for open graph images.
Merge branch 'gh-pages' of github.com:wbprice/open-health-inspection-app into gh-pages
make preview link a button
placed styles in head so page will load; changed link element to script element pointing to bootstrap.js, placed bootstrap.js after jquery, as it needs jquery to function
Merge pull request #72 from jalbertbowden/gh-pages

placed styles in head so page will load; changed link element to script ...