[Instance segmentation] Mask R-CNN/Detectron2 모델 파일 분석

mask-rcnn .circleci configuration of the environment to run config.yml: environments to run the jobs in .github arrangement on the github environment ISSUE_TEMPLATE workflows CODE_OF_CONDUCT.md CONTRIBUTING.md ISSUE_TEMPLATE.md pull_request_template.md build options that is built on my macosx environment lib.macosx-10.9-x86_64-3.7 configs structure of the whole model(-common-models-mask_rcnn_fpn..