Improve content outline.

[david-boles]

• [ ] Remove all the content that we decided we definitely didn't have time for.
• [ ] Add sections:
  • Bash
  • Basic electronics - Ohm's law
  • Transformations
  • Contributing to the material with GitHub
• [ ] Add detail:
  • Descriptions of material to cover should be detailed enough that you can write the lesson fairly easily.
  • Should include learning objectives, as well as what materials (e.g. videos) and exercises we need to make.
• [ ] Run it past Diane, Karen, Doug, and Stefanie.