Stepwise

Fix
* Allow the current working directory to change ([`7dc96ff`](https://github.com/kalekundert/stepwise/commit/7dc96ff7681e1dc9c7ad459befb54ce3dcd23eb8))

Feature
* Implement MasterMix.copy() ([`19dd947`](https://github.com/kalekundert/stepwise/commit/19dd947565b4c7cb13564f4c9b450287222d1436))
* Provide default width for formatting protocols ([`a52fb68`](https://github.com/kalekundert/stepwise/commit/a52fb6882d2964fc05aebea8c9af794687b67629))
* Expose config paths to protocol apps ([`7c386e3`](https://github.com/kalekundert/stepwise/commit/7c386e3491f540e8daff3f79d70be83ffed1743d))

Fix
* Add missing import ([`ed4528b`](https://github.com/kalekundert/stepwise/commit/ed4528b971a01d8ff6252823dc01b75624110482))

Feature
* Add `Quantity.convert_unit()` ([`618d55e`](https://github.com/kalekundert/stepwise/commit/618d55ecbb8c6cc0f4b112328dc52cbb259aa8b9))

Fix
* Allow `truncate_width` to be given ([`45d4608`](https://github.com/kalekundert/stepwise/commit/45d4608237dcefaaec6d5322954674aa0980aa62))

Fix
* Keep `dl` keys/values in sync after empty value ([`d562fe3`](https://github.com/kalekundert/stepwise/commit/d562fe3a7192acf5105e44d7e8e08188476acac2))

Fix
* Debug the `go` command ([`7285350`](https://github.com/kalekundert/stepwise/commit/7285350a043855983438fc41b2d529632ec944b3))
* Avoid infinite recursion with autoprop>=2.0 ([`bc6fdd8`](https://github.com/kalekundert/stepwise/commit/bc6fdd8bd63100d370a8a1791f81ec1148594b0d))
* Update semantics for callable `appcli.Layer` values ([`0a948bd`](https://github.com/kalekundert/stepwise/commit/0a948bd3b93bb17c522b3bcf2fc577c5b2c62904))

Feature
* Teach `sw step` about subsubsteps ([`fabfdd7`](https://github.com/kalekundert/stepwise/commit/fabfdd78a2e8477d67546f19541c4840c4d5f6f3))
* Add `dl` and `table` formatting objects ([`efb8a42`](https://github.com/kalekundert/stepwise/commit/efb8a42eda72fcf819ce04a9c1fb6c51830b3b06))

Fix
* Remove more debugging code ([`e7533d1`](https://github.com/kalekundert/stepwise/commit/e7533d182f1f5b6856fd93db13c9cd7772674240))
* Remove debugging code ([`9891b1c`](https://github.com/kalekundert/stepwise/commit/9891b1cbd1432274111aa055663307536168a152))