PySceneDetect v0.5.1

• [feature] Add new export-html command to the CLI (thanks @wjs018)
• [bugfix] VideoManager read function failed on multiple videos (thanks @ivan23kor)
• [bugfix] Fix crash when no scenes are detected (#79, thanks @raj6996)
• [bugfix] Fixed OpenCV not getting installed due to missing dependency (#73)
• [enhance] When no scenes are detected, the whole video is now returned instead of nothing (thanks @piercus)
• Removed Windows installer due to binary packages now being available, and to streamline the release process (see #102 for more information). When you type pip install scenedetect[opencv,progress_bar], all dependencies will be installed.