Add feature to map.html

[rbeerster]

Now you can click on a quake in the map and it will highlight the quake in the table and vice versa.

[crotwell]

Thanks for making a pull request, I appreciate the effort.

I would prefer that style not be set on elements, and instead the style be create in the CSS for the page, and whether or not the style is applied to a row be controlled by whether it has the class set on it. So instead of setting style to be green on the row, you add the class SELECTED to the classList for that row. I believe this is a better way of doing CSS styling.

Also helpful if the PR doesn't include console.log and doesn't comment out code lines.

thanks