PAPYRO::PageView
 * Abstract out the callout window (for use elsewhere) - srp
 * Read-only switch - srp
 * Implementation of populateContextMenuAt() - srp
 * Only popplerise a page once a paintEvent has occurred - srp
 - Bouncing animation - srp
 - Context menu demo functionality (to be redesigned in future) - srp

PAPYRO::DocumentView
 * DnD functionality of adding new documents - srp
 * Add functionality for the "Bound" PageMode - dt
 * Proper keyboard actions - dt
 * Fix anchor point for zooming - dt
 - Page navigation API - dt
 - Add functionality for the "Continuous" PageFlow - dt
 - Context menu for zoom and page layout - dt

