New Inkscape input tool (spiro friendly) updated

This new input tool for inkscape is designed to complement the existing tools inkscape already has by providing an new and versatile way of inputting paths, similar to xara,s "shape editor tool".
This new input method is ideal for use with Spiro as it does not require the user to "click and drag" (to create Beizier handles)in order to produce a "curve node" and in the process shape the resultant curved line segment on the fly ETC......