Database and Rule classes in model added for DatabaseView
DatabaseView contains a textArea (will be used as an input&display for database status
ExecutionView and Controller added (will be responsible for executing programs ... include control buttons and actions)
Database facts property bound to the text area, execution view&controller removed (merged into Canvas
Clearing up small bits
ExecutionManager introduced, an executionLayer is drawn on top of the diagram to show execution steps (small circle), the circle is not in the correct position at the moment
Merging arrow at the end removed
scaled down the multiChild nodes, isShiftDown used for expanding button (no action yet)
scaled down the multiChild nodes, isShiftDown used for expanding button (no action yet)
a few comments added, execution circle disappears when finished or no path is available
rename confusing parameter
fluents now distinguished at abstract level
common starts of multiChildEntity are merged together