[ysh] (2/3) Sketches of YSH Features

YSH, or the shell formally known as oil, is touted as a possible upgrade path from Bash.

This is the first in a three-part series of posts re-introducing the language.

1. Reviewing YSH
2. Sketches of YSH Features (you are here)
3. YSH, Narrow Waists, and Perlis-Thompson Problems (Not yet released)