fixed inconsistent scrolling amount when using various scrolling methods as well as scrollbar detection logic

clean-up plus an ugly hack for autopatching to trigger getscroll (for some reason tkpath either draws out-of-order and therefore does not execute getscroll when asked or there is something else amiss that is yet to be determined). For the time being we force getscroll 100ms after autopatch.

*the cursor should change to a click arrow when hovering over a scrollbar. Various improvements to scrollbar logic.

improved keyboard interaction with arrays (shift+click adds a point, ctrl+click deletes it--still need to figure out the role of shift when wonset is set) and instantaneous cursor update. minor refinements to drawsymbol.

*better getrect for scalars inside plot/array (entire points are now selectable instead of arbitrary rectangle around the object)

toggle_scroll force getscroll improvement, removal of conventional scrollbars from the canvas and other minor optimizations

*fixed drawsymbol scalars' double names
*improved build process for tkpath
*improved to-front/back logic

forgot to include another file and additional improvements to the previous commit, including improved tofront/back behavior (apart from lingering bugs)

first stab at porting core GUI to tkpath with SVG goodness. new scrollbars that will hopefully put an end to the old painful scrollbar nonsense. pdtk_tip clean-up and improvements. tons of other small bug fixes. a number of issues/wishlists still exist before the next big release:
*improve g_array lower/raise to use new functionality (BUG! doesn't match any items)
*scalar is drawn behind at first
*Scope~ window name "h16ffd10" already exists in parent (likely resize hook)
	*Change appearance of the resize hook
*better getrect for scalars inside plot?
*reenable bgerror and t_tkcmd catch
*Clean-up and merge cyclone documentation

fixed segfault when undoing changes to the array (need to design a new undo type for this, so for the time being undo is disabled for this action), fixed incorrect type of plot upon creation.

added following features to cyclone/comment: accelerated displace, consistent font kinds/sizes, pd-l2ork select color, resize cursor.