[WIP] Swift reboot

Updating presentation for Swift, and trying to address the feedback in #21. Anything in all caps is a note for myself about something that still needs to be done.

The presentation itself is in [Deckset](decksetapp.com) format now, intended for use with the “Next” theme.

- [Source Markdown](https://github.com/jspahrsummers/enemy-of-the-state/pull/22/files#diff-75)
- [Rendered PDF](https://github.com/jspahrsummers/enemy-of-the-state/raw/reboot/Enemy%20of%20the%20State.pdf) (does not include presenters' notes, and may be a couple revisions behind)

Comments welcome! :heart::bow:

**To do:**

 - [ ] Add code samples where missing
 - [ ] Add presenters' notes where missing
 - [ ] Audit apostrophes and quotation marks
 - [ ] Think hard about ordering
 - [ ] Link to all referenced talks/posts in README
Hmm… I could be convinced to do that, but my biggest concern there would be that the relationship between abstraction and crashiness is unclear.

At least where it is right now, it's clear that this is leading into “state is bad, and here's why.”