- and improve output of functional tests overall

- use shared memory instead of fifos for most I/O
- re-enable functional tests

this resolves #3

And don't bother checking if we can do another flight, capture that
functionality in another test

- Add some prints to scripts to help with debugging
- Add timeout if spawn fails
- Add more time to allow changes to take effect
- Fix input design

And add I2C implementation for virtual quad

- uses virtual quad