resolves #16

Revert "quad: move sytem to xps_project"

See merge request !14

This reverts commit 38ad9f47

resolves #7

Thanks for breaking the build

- and improve output of functional tests overall

quad: add valgrind to CI

See merge request !13

Quad i2c rework

See merge request !12

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

Updated model to include velocity controller and two degrees freedom controllers, still contains bug