Updated README.md
Merge pull request #7 from danbender/gh-pages

* added authors
Update README.md
Update README.md
dan:
* made board and h1 smaller so it fits on screen
* removed whitespace in index.html
* clean out css
fixed FF bug: issue is a missing existence/length check in BoardSetup addDivsToCells, likely cause is an innerText instead of textContent