v1.2.0 New query interface

This version introduces a Journal-Query interface designed for exploring past journal entries. The jouno main interface is primarily focused on tailing the current journal and forwarding selected journal-entries as desktop-notifications, the new query interface is primarily focused on providing a way to look back though journal entries at past boots via a calendar timeline. See the screenshot in the README.md for more details.

These new additions are quite functional, but they remain a work in progress and will change as further features are added.