Lots of view love. Fixes ndlib/planning#263

Hide results when displaying a blank search

Link site title to root path

Flexing the search layout to accommodate welcome screen

"Home" page allows discovery; fixes ndlib/planning#263.

If the user is logged in go ahead and show them a listing of all the
items in the repository. If they are NOT logged in they can perform any
search to see the results.

Updating the search results views

There should really be a better way to do this if only the attribute
list changes from concern to concern.

Reordering search result actions

Site title color adjustments

Datasets have descriptions not abstracts

Tidying up attribute listings