Added quad control_algorithm to Simulink model.

controls/DataAnalysisTool/Tool/simplePlots.m

controls/model/c_controller.c

controls/model/c_controller.h

controls/model/modelParameters.m

controls/model/quad_files/.gitignore

controls/model/quad_files/copy_files.bat

controls/model/test_model.slx

quad/computation_graph/src/graph_blocks/node_add.c

quad/computation_graph/src/graph_blocks/node_constant.c

quad/sw/modular_quad_pid/src/graph_blocks/node_mixer.c