Building Snap v1.0
Allows Construction brushes to snap to a placement and rotation grid.
Grid can be adjusted between 0.5m (default), 1m, 2m, 3m, 4m, 5m, and 0m (off).
Rotation can be adjusted between 1°, 5° (default), 11.25°, 22.5°, 45°, 90° and 0° (off)
