Snap Utilities v5.8

After much work adapting a new system of snapping. Finally is released version 5.8 of the addon =) Now in version 5.8, the basic system of snapping is independent of the selection, this allows a greater freedom in programming the code. Allowing the addition of new features such as: - Snap to edges on all visible objects; - Snap elements are obtained from the object with modifiers; - In editing mode, the MOVE and ROTATE tools transform only the selected elements; - There is no longer any need to enter edit m