Nu Shell Updates - Week #57

1st chunk of `blog/2020-09-25-twin0057.md`

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# This week in Nu #57

- gillespiecd [removed unused files in nu-data](https://github.com/nushell/nushell/pull/2598), [consolidated suggestion code](https://github.com/nushell/nushell/pull/2597), [cleaned up 'did you mean'](https://github.com/nushell/nushell/pull/2595), added [spaces between column suggestions](https://github.com/nushell/nushell/pull/2586)
- fdncred [improved Windows builds](https://github.com/nushell/nushell/pull/2594), [added more table themes](https://github.com/nushell/nushell/pull/2579), [updated the operator map in the book](https://github.com/nushell/book/pull/132)
- luccasmmg [removed the path check for `rm -f`](https://github.com/nushell/nushell/pull/2590)
- jonathandturner [released 0.20](https://github.com/nushell/nushell/pull/2588), [upgraded bigint/bigdecimal](https://github.com/nushell/nushell/pull/2585), [renamed some internal symbols](https://github.com/nushell/nushell/pull/2581)
- notryanb [added csv support to `fetch`](https://github.com/nushell/nushell/pull/2587)
- coolshaurya [improved `help commands` when showing subcommands](https://github.com/nushell/nushell/pull/2584)
- mattclarke [added tests for `ls -a`](https://github.com/nushell/nushell/pull/2582)
- radekvit [implemented passthrough for `benchmark`](https://github.com/nushell/nushell/pull/2580), [fixed panics in `random int`](https://github.com/nushell/nushell/pull/2578), [added global mode to `str trim`](https://github.com/nushell/nushell/pull/2576), [added system, user, and idle time to `benchmark`](https://github.com/nushell/nushell/pull/2571)
- jzaefferer [added a custom panic handler to the demo](https://github.com/nushell/demo/pull/63), and [fixed a broken api call in the demo](https://github.com/nushell/demo/pull/62)

Title: Nu Shell Updates - Week #57

Summary

A summary of the changes and updates to the Nu shell and its related projects for week #57. The updates include improvements to suggestion code, Windows builds, table themes, operator map, `rm -f` command, bigint/bigdecimal upgrades, `fetch` command with CSV support, `help commands`, `ls -a` tests, `benchmark` passthrough and time tracking, `str trim` global mode, demo panic handler, and demo API fix.