Fixed the ocp file for building with threads
A way to stop computation in the toplevel on Windows
A simple, if not bullet-proof way of preventing user output to stdout
Workaround GTK bug with scroll bars and resizing

livelock when redimensioning panes with auto scrollbars: force them on
Added a window icon
Handling toplevel birth&death, binding related query and response
fix: not responding after `#load`
Preliminary support for error localisation
Updated README.md