use credit in the README of new project instead of fork

[benatkin]

When I see "forked from" like it says on the new repo I automatically want to follow the link, and I think a lot of others do, too. There's a StackOverflow issue on this. It would be nice if @wko27's project was turned into a standalone project instead of a fork.

It appears to require contacting GitHub Support. @wko27 if you want maybe you could avoid that by deleting and re-creating the project now, since you would only lose one issue and 4 stars.

[benatkin]

I see that the credit is already in the README so after changing the fork flag it will still have credit.