component_lib in schematic:
  - There was a major change in where the component libraries are stored.
    They now reside in the kicad_sch_json.component_lib.
  - Schematics are no longer updating their own component libraries by
    fetching from cache locations.
  - This allows for things like 'constructNet' to be called pretty much
    independantly.
  - schematics are now pretty much self contained instead of depending on
    external libraries.