EPC: Better HTML tables for 1-23, related styling

And _site including latest new images
Add image-creation guidelines to README
Typo in README
EPC: change image placement at 3-5
Author's corrections
Remove _site
Merge pull request #22 from electricbookworks/emmaattwell-gh-pages

Author's corrections. Lots of _site changes I'm going to ignore.
Add _site to .gitignore