Added in-plane drag friction and transient on thrust to model - this version seems to be matching the system

Reverting first setpoint for autonomous back to current position. Was swtiched to (0, 0) for optical flow.

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

Conflicts:
	quad/src/quad_app/iic_utils.c
	quad/src/quad_app/iic_utils.h
	quad/src/quad_app/sensor.c
	quad/src/quad_app/type_def.h
	quad/src/virt_quad/hw_impl_unix_mio7_led.c
	quad/xsdk_workspace/real_quad/src/hw_impl_zybo_tests.c