- New DBPFM plugin type (TypeInfoFactory) to provide the necessary
information (includes necessary CMake stuff)
- The TypeInfoImageProvider uses these plugins to generate pixmaps from
provided icons
- New proxy model to add decorations and manipulate Display of types in
DBPFM
- Initial plugin for Sims 1 type info

Adds icons from KDE's Breeze set as fallbacks, but attempts to use
system defaults first (only on Linux).

All in all this adds a touch of user-friendliness, as it's become much
easier to identify types (now by names, rather than hex codes)

Minor required changes:
- Q_ENUM() for the container enums (requires Qt 5.5+)
- Bump copyright year in Readme