Move to rich text for some Event attributes

Text areas are too limiting for some fields on the Event, and we should move to rich text for description and location.

This will allow us to easily accommodate multiple speakers for an event, as well as complex or longer location descriptions.

So location becomes its own rich text field, and we can squish presentation & presenter into a description field.

This way, we can embed links to the right things via the GUI, and this should also simplify the layouts/_event_layout.html.erb file.

toronto-ruby / toronto-ruby.com