Merge branch 'master' of https://git.ece.iastate.edu/danc/MicroCART_17-18

quad/scripts/tests/uart_stress_tests.py

quad/scripts/uart_comm_listen.py

quad/scripts/uart_comm_send.py

quad/scripts/xsdk/build_zybo.sh

quad/scripts/xsdk/clean_xsdk_workspace.sh

quad/scripts/xsdk/create_zybo_boot.sh

quad/scripts/xsdk/old_quad_build.sh

quad/src/quad_app/callbacks.c

quad/src/quad_app/controllers.h

quad/src/quad_app/hw_iface.h

quad/src/quad_app/initialize_components.c

quad/src/quad_app/quad_app.c

quad/src/quad_app/util.c

quad/src/virt_quad/Makefile

quad/src/virt_quad/hw_impl_unix_i2c.c

quad/src/virt_quad/hw_impl_unix_mio7_led.c

quad/src/virt_quad/hw_impl_unix_pwm_input.c

quad/src/virt_quad/hw_impl_unix_pwm_output.c

quad/src/virt_quad/hw_impl_unix_uart.c

quad/xsdk_workspace/README.md