Add autocompletion

I saw your interesting talk at Nerd Nite, so I decided to implement autocompletion.
I only did it for the desktop page, because it didn't integrate well with the mobile version, as the suggestion were outside the screen. For that, the mobile design should be changed, e.g. by moving the input field on top and displaying suggestions on the whole page.

New places can be easily added in autocomplete.js.