adding unity to vendor folder

...crazyflie-firmware-lab-part-2/vendor/unity/.gitattributes

...are/crazyflie-firmware-lab-part-2/vendor/unity/.gitignore

...re/crazyflie-firmware-lab-part-2/vendor/unity/.travis.yml

...ware/crazyflie-firmware-lab-part-2/vendor/unity/README.md

...ie-firmware-lab-part-2/vendor/unity/auto/colour_prompt.rb

...-firmware-lab-part-2/vendor/unity/auto/colour_reporter.rb

...firmware-lab-part-2/vendor/unity/auto/generate_config.yml

...-firmware-lab-part-2/vendor/unity/auto/generate_module.rb

...ware-lab-part-2/vendor/unity/auto/generate_test_runner.rb

...lie-firmware-lab-part-2/vendor/unity/auto/parse_output.rb

...firmware-lab-part-2/vendor/unity/auto/stylize_as_junit.rb

...firmware-lab-part-2/vendor/unity/auto/test_file_filter.rb

...e-firmware-lab-part-2/vendor/unity/auto/type_sanitizer.rb

...rmware-lab-part-2/vendor/unity/auto/unity_test_summary.py

...rmware-lab-part-2/vendor/unity/auto/unity_test_summary.rb

...e-firmware-lab-part-2/vendor/unity/auto/unity_to_junit.py

...-part-2/vendor/unity/docs/ThrowTheSwitchCodingStandard.md

...rtionsCheatSheetSuitableforPrintingandPossiblyFraming.pdf

...-lab-part-2/vendor/unity/docs/UnityAssertionsReference.md

...e-lab-part-2/vendor/unity/docs/UnityConfigurationGuide.md