added one more tutorial to new ds-tutorials

pd/doc/4.data.structures/pd-l2ork/ds-tutorials/00.under.construction

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+#X text 13 0 Still under heavy development!;
+#X text 43 160 * stroke and fill methods;
+#X text 43 40 Stable methods of the new [draw] object are:;
+#X text 43 120 _Close_ to stable (won't change unless some big problem
+is revealed):;
+#X text 43 190 Wish I could figure out a better way to do them:;
+#X text 43 80 * stroke-opacity \, fill-opacity \, transform \, stroke-width
+\, stroke-miterlimit \, rx \, ry \, and stroke-dasharray methods.;
+#X text 43 330 * [draw group]. This will probably change to [group]
+and feature a subpatch so that you can do svg group nesting.;
+#X text 43 300 Unstable (will probably change):;
+#X text 43 470 Experimental:;
+#X text 43 220 * fill-rule \, stroke-linejoin \, stroke-linecap. The
+problem is that they take symbolic arguments in the svg standard \,
+but with data structures a symbolic argument represents a variable
+field. So I just use a float argument. I could use quotes around a
+symbol to specify a constant string \, but that would be obscure and
+at odds with the rest of Pd.;
+#X text 43 370 * [draw shape] pattern \, [drawsprite] name \, [drawimage]
+names. They are inconsistent. I don't particularly like the two word
+naming scheme of [draw shape] \, but [drawpolygon] is already taken
+and has a different interface. So I'll either change [draw shape] to
+some one-word selector or change [drawsprite] to make it more consistent
+with what I have so far.;
+#X text 43 490 * mouse-dragging hotspots. This currently works like
+old-school scalars \, and it even works with transforms. It's original
+design is too limiting \, and with ds arrays the element hotspot may
+even conflict with the coordinate hotspot. A more expressive way is
+needed \, maybe something ported or inspired by Raphael.;
+#X text 43 570 * scalar bbox caching. All that code is essentially
+a duplication of tkpath and needs to happen in the GUI.;
+#X text 480 333 Upcoming:;
+#X text 480 353 * data method and x \, y \, etc. method for changing
+shape coordinates on the fly;
+#X text 480 393 * methods to better control mouse interaction. Something
+like the old "-x" flag but allowing separate control of edit-mode displacement
+and hotspot dragging. (Just because the drawing data contains a variable
+doesn't mean it should be draggable.);
+#X text 480 463 * [draw image] instead of [drawimage] \, so that it's
+transformable. (Maybe the same with drawsprite \, not sure...);
+#X text 480 513 * [draw text] for scalable svg text.;
+#X text 480 543 * better [draw group] inheritance. Currently drawing
+a shape gives it a bunch of default attributes which you have to manually
+turn off to inherit attributes from a group.;