UX: Hello: Hide contribute panel until called upon

The hello page has a lot of information on it.
Focus on the member, and when the patron is ready,
she can click on "Contribute" if that's what she
wants.

Then we can show the contribute panel.

The support and backers panels have been hidden until
they can be appropriately integrated into the page.
UX: Hello: Clean up header, footer

In the header, show a welcome message,
with a link to the about page, instead
of a cold "anonymous." Also fix the
alignment.

In the footer, remove everything, because
it's distracting on the hello page.

Fix the issue where the footer was floating
in the middle of the page, which was relating
to setting various things to 100% height.
Contribute: Link to member profile

Link to the member's name and photo back
to the profile, because that's what it
wants to do.