Fix links on share page

Fixed the links on the share page not linking correctly to the group.
Closes #103
Add infinite scrolling to patient index
Add add 'load more' to case finder
Add hpo term counting xrays and clin sum
Improve text on HPO counter
Change colour of HPO counter bar
Fix up appearance of hop terms
Improve tag appearance
Fix commenting not working
Change appearance of discussions

Cleaned up how the discussions looked, removed those awful headings and
stuck the page in a container.
Merge pull request #113 from cmcnamara87/tidy-up

Tidy up