Merge information in README.md into /register-events page

[rradczewski]

Right now, the Readme contains a lot of detailled information that does not appear on the /register-event page.

Merging that information into the /register-events page will make it easier for hosts to create an event, as they have all the information in one place.

We can then change the README to focus on contributions, technical details of setting up the project, and so on.

[mplavcan]

I've made the register-event markdown a complete import of README.md

The only incompatibility is the embedded JSFiddle script.

[mplavcan]

Looks like GitHub guards against external scripts, and there's no conditional formatting available at the repository view level. I've made it look pretty, but the JSFiddle link will still be inoperative there.