Fastqe

- Add custom dict example to README.md

Add test custom dictionary to repo

Major rewrite of `fastqe` as version 0.2.1 in July 2020:

- refactor code to support new options
- add long read support with --long
- add --noemoji for block-based output on systems that don't support emoji
- add --custom for user-defined mapping to emoji
- add --output to redirect to file instead of stdout
- add gzip support
- add redirect from stdin support
- fix bug of dropping position if some sequences are only 0 quality

First pre-release of `biomojify` following rapid development during the Galaxy Community Conference and Bioinformatics Open Source Conference (BCC2020) CoFest.

Also added the v to the tag!