Made box shadows smaller, added border to filter and title div - box shadows don't play well with two divs next to each other that you can't wrap a container around them due to leaflet control
added arrow for description sidebar to make it obvious that it hides. 'i' was annoying and moved in different browsers
Merge pull request #20 from parnelandr/boxShadow

Made box shadows smaller, added border
Merge pull request #21 from parnelandr/arrow

Arrow to hide sidebar