Event request

[trymebytes]

At the moment only GTEs are able to create events. We want to allow anyone create an event but will only be published on the approval of a GTE/admin.
This would allow for more people to get involved in hosting Translation Events.

[akirk]

We discussed that this would mean that the new event could only be published as draft by anyone, and we need a way to approve events. GTEs could do that.