move welcome.md to welcome.html
update opacity when moving item to top of list
dont save openDocId in localstorage. use url to open document

doesn't work right now. I can't figture out why, but the url always
gets reseted.
maybe it's remotestorage stealing the hash?
make entires.scrollToSelected work again

still need to test it on mobile though..
use Date.now() as id / being evil
dont display a url when doc has no title