allow for relative linking inside the stat page

[tooomm]

link could be e.g.: https://tooomm.github.io/github-release-stats/?username=Cockatrice&repository=Cockatrice&tag=2017-05-05-Release-2.3.17 and should jump to the correct release stats on the github-release-status page

same handling as on github wiki or readme files for headlines would be neat:

• hover of release "area" or anker area should highlight anker logo
• click on it will jump to that release within the page (reload page on that new link)
• you can copy and paste the address bar to share it