AMY release v1.6.2

Whoa, another one?! Yesterday we released v1.6.1, today it's time for v1.6.2 with some very minor changes.

New features

• New fields in the training request form:
  • group name will enable us to register groups for the training, without (for now) the need for a new form
  • comment will be a place for any additional information; instead of it, people would use additional skills.
• Event.slug received new help text containing a format description for admins to use. This field's validation was also changed so that it only allows entries in this specific format (this is additional to other validation done by Django, ie. only latin characters, digits, underscores and hyphens allowed).

Bug fixes

• Migration 0088*, which was supposed to generate fake slugs for events without them, contained an error that we hit in the production, so Piotr fixed it by adding random characters to the slugs if uniqueness constraint was about to be violated.