In case the login process takes some time we would show a "login"
button which makes the user try to click it. There is a good chance
that aroudn that time we get logged in, so the click will log the user
out.

Avoid that by not showing anything during logging in.

Add a typescript example package

See merge request !14

This is all very basic, building works, testing works,
but there are type checking errors which I don't know how
to fix.

Improvements welcome.

See #41

See #40