Justine Frank

We want to model the way that Wasm modules can be linked to call Javascript functions, which can then perform certain modifications to the Wasm module from outside the Wasm...

This PR now includes safe procedures for ffi functions to change some of the state of the wasm program. Closes #8

@lenormf, what are your thoughts on these changes?

One way you could get around the problem of inconsistent behavior between interactive and script use could be to automatically expand a fold if a selection enters it.

I felt like the inconsistent behaviour between insert completion menus and prompt completion menus was not desirable, and I couldn't think of a way to make the prompt completion work...