Windows Bot Setup

1. Install git https://git-scm.com/download/win
2. Install msys2 and copy 'zip' from mys2's bin to git's (TODO: maybe we should start with msys2)
3. Install python 2.7 https://www.python.org/downloads/windows/
4. Ensure installer adds it to the path
5. Install node js lts https://nodejs.org/en/
6. cd c; mkdir pdfjs
7. Install botio from cloned repo (the npm package is not up to date)
8. git clone https://github.com/brendandahl/botio.git
9. cd botio
10. npm install -g .
11. cd .. (back to pdfjs)
12. Install bot files
13. git clone https://github.com/mozilla/botio-files-pdfjs.git
14. cd botio-files-pdfjs
15. edit config.json
16. edit test-files/browser_manifest.json
17. copy amo.json to this folder
18. Setup pdfjsbot github access token
19. Start the bot botio start --user pdfjsbot --pwd <github access token>
20. Setup webhooks on github