How easy should it be to install Liberty?

That easy:

$ ./install.sh

And now it is that easy.

The toddler starts to run

Starting with commit e5799, the interpreter correctly runs arithmetic tests. It is more important than it seems: it means that arithmetic types are correctly promoted (think conversion + a specific conversion of Current for symmetry).

I think I'll start working on agents now, otherwise a lot of tests won't run (see EIFFELTEST_TOOLS which is agent-based)