Change from "cyclops" to "cyclone_ops" to avoid any potential name clashes
with other libs

essentially guarantees that there will be unused parameters, so these warnings
end up being noise even for external libs.

remove OSCx/configure (should have been done in last commit, which was only adding a line to the oscx_clean target)

improve the external dialog api by adding an additional argument to specify the input type, refactor grid dialog to the new interface

* the commits from Pd-extended Sourceforge were then (selectively) merged
  with the ported gui code.

repo cleanup: remove tcl/tk build infrastructure and scripts, old patches, automated build scripts for pd-extended, old gui plugins, and unnecessary install-time dependencies

port all relevant externals to the new loadbang interface. Unfortunately it has some #defines hidden in g_canvas.h, so we port that macro individually to each affected library.

Pulled latest libdir version from https://github.com/pure-data/libdir, needed for compatibility with the new loader.

port moonlib/mknob, and fix an iemgui dialog bug with empty strings not getting changed to zeroes for numeric fields