Rewrote edit page to use for loops, allow dynamic number of blocks

More spaces can be shown by using additional “blocks” parameter (url
like /edit?date=02%2F23%2F2014&blocks=14)
Hide "now" and "next" sections on main page when they are empty, and if both are empty, say "No School"

This removes the need for before school, after school, and weekend
blocks. Commented out those blocks in yaml file.
Created about page
Misc code cleanup
About page request handler