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

groundStation/scripts/bypass_kill_switch.sh

groundStation/scripts/parameterize.sh

quad/executable.mk

quad/scripts/tests/run_virtual_test_flight.rb

quad/scripts/tests/test_safety_checks.rb

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