Fix typo in history.js

"handle a errors" fixed to "handle errors"
"timestap" fixed to "timestamp"
Merge pull request #45 from rviscomi/typo

Fix typos in history.js
Add the initial documentation files.

All documentation and content is written using Markdown.  A future change will
use Jekyll to generate the website from these sources, and when ready, the
generated output will be pushed to GitHub Pages.

Progress on #47.