Add some CSS, to test layout

This will need to moved into the sitewide CSS, when this is done.
Towards #158.
Remove Solarium autoloader registration

We don't need this. Towards #158 and #426.
Establish a Search class, move search form method into it

Towards #158.
Move paging into Search class

Towards #158.
Misc. search results improvements

Towards #158.
Check $this->config more closely
Simplify Solarium functionality

Towards #426.
Give get_url() access to the database