Backgroundremover Versions Save

Fix an issue bad naming of variable. A thank you to @ya0guang

Update readme with how to use backgroundremover as a library and made a pull request fixing the circular imports for it to work correctly. A thank you to @ahmad88me

Fix an issue with moviepy requirments.

Take out shlex, put commands from subprocess into list before.

Let ffmpeg log alphamerge to see if helps shine 0kb error

Closes issue https://github.com/nadermx/backgroundremover/issues/84

Fixes https://github.com/nadermx/backgroundremover/issues/78 and https://github.com/nadermx/backgroundremover/issues/80

Fix issue #18 for Mac users Fix issue with inputs of videos with special characters Fix spelling issues in read me

Fix issues with windows. Fix issues with download files from google vs github. Fix issue with remove background from local video and overlay it over an image Fix issue with frame_rate detection on some videos

Fix issue with u2net import, where would re download existing libraries on system.

Fix relative import issue

Reduce requirements due to upload of wrong file last push, and tesed on python 3.6, 3.7, 3.8, 3.9