TODOs to be resolved once in demo

This reverts commit 19d9b391ed0fd123870992977605b20aadc6e223.
Link to important contributor informations in README.md
Special branch strategy link in README.md
Update README.md
Only general link to wiki overview page in README.md
more prominent link to wiki in README.md
Revert "TODOs to be resolved once in demo"

This reverts commit 7cac7f3b50b9e9cbd38966f60e41d3f538f74b26.