add /closed page

display all resors that claim to be still closed
simplify routes module

use multiple methods to handle each request
each method saves results in req object calls next() to continue
refactor data - add filtered function

used filtered instead of more specific closed, absent methods
add /confused route

shows resorts that are closed but report open lifts
keyboard shortcuts

O - to open all resorts on the page
X - to close all resorts on the page
Merge remote-tracking branch 'origin/closed'
Stevens Pass is open