Added links to button page

Resolves  #1178.
Resolves  #1094.

http://jenkins.buttonweavers.com:8080/job/buttonmen-AdmiralJota/379/

Added button links to Overview, Open Games, History, Profile and Game pages.

Also added title tags to the button links on the Open Games page to show the recipes. I'm not sure about the appearance of the blue info icons, though. Perhaps it might be adequate to leave the title tag on the link without any special icon for this page?

Dependent on #1174.
There's a typo here which causes a visible bug: the second if statement should look for existence of the button set, not the button.  Indeed, if i set a favorite button set, but not a favorite button, neither one shows up on my profile page.