Implement browse by functionality

[benwbrum]

Andrew writes:
-Needs to be created and integrated.
-Karin has created one – needs to be tweaked in particular ways.
-Should be sortable by:
-Date, Author, Recipient, Origin, Destination, Page Within Barker
-Needs to be cleaned up a great deal.

[benwbrum]

At this point--aside from the data challenges described in Issue #11 we're just down to the UI issues.