add gui_x for sending hex value inside an array to the gui. Not sure if this is really necessary, but it makes it easy to send a list of open windows for one of the extant interfaces

Death to tcl Part 1 (cont.): remove old uncommented code and sys_vgui calls that are replaced by gui_vmess

Death to tcl Part 1: remove all sys_vgui messages that match the following constraints: 1) code is not annotated; 2) has a corresponding gui_vmess replacement; or 3) old commented code that is obviously no longer needed

fix regression with [pd] not respecting new box dimensions when renaming to [pd foo]. Also, comment out more sys_vgui calls in g_canvas.c

add workaround for out-of-order request from Pd that tries to destory a border on a scalar it already told us to erase

first try at get the copyfromexternalbuffer logic ported. This allows to paste Pd source code into a patch