GitLab

* add windows CI

* clean versions

* only allow pt1.7 on windows

* fix windows install issue

* add win cpu

* fix win command

* clean unnecessary command

* resolve turbojpeg & tempfile on win

* replace os.readlink with os.path.realpath

* fix windows ci

* close file before removing it

* fix windows ci

* fix symlink on windows

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* fix windows ci

* modify according to comment
Co-authored-by: zhouzaida <zhouzaida@163.com>

* [Docs] Add header for files

* change to OpenMMLab

* add headers for .cpp, .cu, .h, .cuh

* replace Open-MMLab with OpenMMLab

* add url support for VideoReader

* add a comment

* add unittest

* use a connectable url for ci

* refactor unittests

* split test_video.py to two files

* use f-string

* delete python3.5 sup

* minor fix

* fix supported python version

* fix format

* fix yapf

* remove redundant space

* fix typo

* fix a potential bug of removing temp dir

* bump version to v0.4.2

* add copyright header

* change # to // for cpp files

* add yapf and isort to travis

* minor formatting

* remove blank lines

* skip unit tests for progressbar when python2

* update travis to ubuntu 16.04

* use a newer version ffmpeg

* add -y to add-apt-repository