take :host value from environment on production
Coder error

I was throwing an error but not catching it.
Refactor password reset

Wrote a test to catch what happens when someone tries to enter an
invalid password. Also refactored the code to use simple_form so that
it pulled in the CSS styles automatically.
Remove unused jobholder/manager set via email

We weren't using it, and as we're going to start off by seeding all our
users, we won't need it.
Merge branch 'development' into associated-objects

Conflicts:
	app/controllers/agreements_controller.rb