Added visual indicators between repeated form objects

[cndreisbach]

Issue #193 discussed one specific place that the admin interface needed a visual indicator between buttons. That same pattern repeats itself throughout the location form, so this commit addresses all of them. In addition, it gives a visual indicator between each element in a list of children.

I am not sure if this visual indicator fits your vision, but I think it's nonintrusive but visually separates things well.

[monfresh]

Thanks for doing this. The divider provides a nice separation, and we can always style it differently later. There are a few issues though with the implementation. Could you please make a few changes and additions?

1. The %hr should actually be in the _fields partial aligned all the way to the left, so that it can appear in the scenario where there aren't any existing entries. For example, if you go to a location that doesn't have any contacts (or if you create a new location), and you click the "Add a new contact" button, the %hr won't appear unless you put it in _contact_fields.html.haml instead of _contacts.html.haml. I believe this is the case for all the fields.
2. Could you also please do the same thing for the Service keywords, websites, and service areas (app/views/admin/services/forms), and the Organization websites (app/views/admin/organizations/forms/_url_fields.html.haml)?

Thanks!

[cndreisbach]

Thanks for the feedback, @monfresh! All your requests should be implemented now.

[monfresh]

Thanks!