2.0.0

• Added more path based constraints. Note, these replace the old PathConstraint class.
• Support multiple ModelConstraintAlgorithms
• Configurable pickers (see TilePickerType, IndexPickerType) (for Editable WFC)
• Add Backjumping (e.g.)
• Improved behaviour/performance of backtracking
• Other performance improvements, particularly for large topologies.
• SeparationConstraint fixes
• Fix to Symmetry constraint
• Fix to Count constraint
• Path constraints more consistent over use of TileRotation (#14)
• Fix path constraints "priority" to work with masking
• Fixed #12
• Fix parsing bug on systems where "," is the decimal separator (#15) (thanks grapefrukt)