Addon: Curve Tools: Refactoring. Added context menu.

curve_tools/Curves.py

curve_tools/Operators.py

curve_tools/Properties.py

curve_tools/Surfaces.py

curve_tools/__init__.py

curve_tools/auto_loft.py

curve_tools/cad.py

curve_tools/exports.py

curve_tools/fillet.py

curve_tools/internal.py

curve_tools/intersections.py

curve_tools/mathematics.py

curve_tools/outline.py

curve_tools/path_finder.py

curve_tools/remove_doubles.py

curve_tools/show_resolution.py

curve_tools/splines_sequence.py

curve_tools/toolpath.py