Nu Shell Updates - Week #28

1st chunk of `blog/2020-03-06-twin0028.md`

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# This week in Nu #28

- Bocom updated `ls` to now continue listing files even if a file couldn't be fully listed (#1435)
- coolshaurya added docs for `debug` (#1438)
- thegedge further improved stdin/stdout streaming to allow for infinite streams (#1440)
- notryanb added support for unknown MIME types when downloading (#1441)
- hirschenberger added a `shuffle` command to shuffle the order of rows (#1443, #1455)
- thegedge and andrasio refactored the codebase to move CLI work into its own crate (#1445, #1450, #1451)
- andrasio added the `rename` command to allow columns to be renamed (#1447)
- quebin31 fixed `cd` to correctly error on directory execute permissions in Unix (#1452)
- andrasio fixed some issues with the line editor coloring (#1453)
- jonathandturner added a new internal codec for handling external→internal that works with both binary and text data (#1457)

Title: Nu Shell Updates - Week #28

Summary

This week's updates to the Nu shell include improvements to `ls` command, documentation for `debug`, enhanced stdin/stdout streaming, support for unknown MIME types during downloads, a new `shuffle` command, refactoring of CLI code, a `rename` command, bug fixes for `cd` and line editor coloring, and a new internal codec for data handling.