add pdf configuration options
move login/logout to separate method
better spacing for additional user checkboxes
allow tests to work when users need an ordergroup to order

This is required for tests to work when the signup plugin is enabled.
add plugins #custom
allow reuse of accept_invitation form

Conflicts:
	app/views/login/accept_invitation.html.haml
edit order user-interface update

also closes foodcoops#145
add ordergroup to user form (view)
make ordergroup editing work from user form
allow to set initial parameters for ordergroup in group creation form
show ordergroup directly if requested
fix bug when no parameters given
add tests and make editing ordergroups with user work
fix slightly broken user form, made visible by deface
add foodcoop-adam specific configuration #custom
fix test for combining feature-edit_ordergroup_with_user with plugin-signup
update travis cfg