moved search box into the base template, added spacing

adjusted header size as well
Adds a simple mailto link for flagging inaccurate contact info.

Fixes #69.
for now, picking only the first email

TODO: handle this better
annotate the todo
First pass at rearranging contact pages for agencies.

Handles pages for components, agencies without components,
top-level offices, and subcomponents.
incorporate common requests, and common mis-requests
adding some screens
Merge pull request #129 from 18F/contacts

Contacts landing pages implementation