* add isort config * use isort to sort imports * add isort to travis
[isort] line_length = 79 multi_line_output = 0 known_first_party = mmdet known_third_party = mmcv,numpy,matplotlib,pycocotools,six,seaborn,terminaltables,torch,torchvision no_lines_before = STDLIB,LOCALFOLDER default_section = THIRDPARTY
