[Hold until Sept 11] Close registrations

[vsmart]

Before

After

I left the coaches sign up open for now in case we happen to meet any more cool coaches.

I also learned a new jekyll trick! Parameters for includes such as:
{% include announcement_list_signup_form_slim.html button_label="Abonnieren"%}

[vsmart]

PS: Despite trying to for half an hour, I could not get that email form and subscribe button to vertically align. CSS wizards please take a stab at it, if you like! ✨

[lislis]

aligned buttons!