Add migrations to Expected Events

A bunch of migrations we need for the matching process.
Add migrations to Incoming Events
Add scopes to expected event model

We added active, forward_matching and backward_matching as scopes. (Scopes are basically methods)
Add checkboxes for weekdays
Permit weekdays under private methods

Added every single checkbox in expected_event_params. Maybe there is a nicer way to do that.
Add a couple of new columns to expected_events/index
Create new method to display selected weekdays in index view
Add simple_form gem

We might use that one for upcoming forms. I tried switching existing forms to it, but then refrained from it.
Add checkboxes for matching direction to form
Make checkbox content show up in index view

I did that the same was as the day before for weekdays.
Change expected event column to matching_direction
Add matching_direction to expected event params
Create event_matching_direction method in expected event controller
Add radio buttons to expected_event form
Include matching direction in index
Set custom column width for expected event table
Merge branch 'fix_table' into matching
Add css to expected events form

The checkboxes were all messed up, so I put them in order and put boxes around the various sections.
Add styling to expected event form
Add weekday and matching direction fields to show view.