User management stub
Added judge-drawing and rudimentry team management.
* changed from Brushes to Colors for storing colors; more versatile, but requires last-minute conversion for painting.

* added sample teams for population
* created mostly-working UI for team management
* fixed databinding bug

* more sample teams
* added (some) unsaved data catching
* added icons

* added team deletion/recycling
* added colored swatches to team overview
* changed text buttons to icons
Got table subdivisions drawing :D