-make complete gui
-cabinet models
-tone library
-effects library
-effects level
-handling presets (saving, exporting to xml patches)
-buildsystem (install knob.png to share dir, don't use inline knob pixbuf)
-expression pedal settings
  -finish modifier_linkable_list() (gdigi.c)
  -make modifiers[] complete (gdigi.c)
  -add it to gui