Merge remote-tracking branch 'origin/quad-yaw-fix2'

quad/src/gen_diagram/network.dot

quad/src/gen_diagram/network.png

quad/src/graph_blocks/graph_blocks.c

quad/src/graph_blocks/graph_blocks.h

quad/src/graph_blocks/node_accumulator.c

quad/src/graph_blocks/node_accumulator.h

quad/src/graph_blocks/node_add.c

quad/src/graph_blocks/node_add.h

quad/src/graph_blocks/node_bounds.c

quad/src/graph_blocks/node_bounds.h

quad/src/graph_blocks/node_constant.c

quad/src/graph_blocks/node_constant.h

quad/src/graph_blocks/node_gain.c

quad/src/graph_blocks/node_gain.h

quad/src/graph_blocks/node_mixer.c

quad/src/graph_blocks/node_mixer.h

quad/src/graph_blocks/node_mult.c

quad/src/graph_blocks/node_mult.h

quad/src/graph_blocks/node_pid.c

quad/src/graph_blocks/node_pid.h