Add link to GitHub repo from webapp

[acka47]

Currently, there is no link to this repo from https://metafacture.org. This should be added (probably similar to https://metafacture.org just with the octocat icon).

[dr0i]

Not sure what you mean re octocat icon. There is one octocat icon at https://metafacture.org/ , which points to Github's organisation metafacture.
I've just added a section Metafacture Playground describing the Playground a bit and link from that section to this repo here, analogue to the Metafacture Fix section.

[acka47]

Not sure what you mean re octocat icon. There is one octocat icon at https://metafacture.org/ , which points to Github's organisation metafacture.

I meant something like this:

I've just added a section Metafacture Playground describing the Playground a bit and link from that section to this repo here, analogue to the Metafacture Fix section.

That is fine with me though I generally think that there is also too much information at https://metafacture.org/ and we should at one point re-work the page to make it easier to grasp what Metafacture is with just reading a few bullet points.