fixing contact form bugs introduced from frontend merge; implement tracking IP address in contact form submissions.

Bugs:
* Org URL is required in the contact form (bad)
* Frontend changes somehow led to a few errors; contact form breaks (bad)
* Some styling issues for the contact "thank you" page

And the reason I started mucking with this code at all:
* We want to track as much info as possible; grab the contact IP address (we can later plot a map of contact form submission IPs)