Chunksum

- support for specifying a file, files, directories, or read content from stdin
- run with same number of multi-processes as cpu
- fix the dest of soft link missing issue
- fix permission deined issue
- fix progress bar length when path include asian characters
- auto adjust progress bar when the windows size changed

- add the total progress bar
- more user-friendly command line interface

- specify a chunksums file to find incremental updates

- fix support for python 3.7 and 3.8

- fix giga definition

- add parser
- support python 3.7+