Embeds opengraph data on badge pages.
Checks that opengraph and fb data is defined before trying to loop through it. Fixes bug and tests should now pass.
Add a head block and htmlPrefix variable to layout.html to keep things clean.
Merge pull request #633 from andrewhayward/614-share-page-stories

Templates looking in wrong place for information
Merge pull request #620 from davelester/feature/opengraphdata

Embed opengraph data on individual badge pages
Moving fullUrl out to utils module
Merge pull request #641 from stenington/fullUrl-fix

Moving fullUrl out to utils module
Encorporating logo with hexagonal shadow and navbar border
Including logo with reduced logo text size
Restore development flag: stealing thimble ribbon but with SHA tooltip on hover
Bring the test ribbon to the front
Smooth edges in FF