add submodule ref for slugs
add support for slugs as a synthesizer
Update to use slugs version that outputs to .aut file, require it to use "robotics semantics"
if JTLV is not compiled, show a proper error in specEditor instead of mysteriously hanging and requiring people to look at the console
update jtlv-not-compiled error message to point to setup.py
fix recursive wx.yield errors in speceditor
bring slugs up-to-date
update speceditor wxg to match jim's accidental F7 commit
add 'synthesizer' and 'symbolic' options to speceditor menu
properly report synthesizability result in speceditor when using slugs