Fix some typos, update the FAQ, and change the behaviour of listen_in…

…_background (BACKWARDS INCOMPATIBLE - bumped major version).

Bump version.

Improve the build process a bit now that we're using conventional login.

Fix explicit device index.

Add contributors and clarify.

Better error checking, fix examples, more stuff.

Bump version.

Fix background listeners.

Add `listen_in_background` function and a few small fixes.