documentation for localStorage
RemoteStore: renamed 'state' event to 'state-change', so it can't be confused with the 'state' attribute. Also extended documentation.
added documentation for NodeHTTP and BrowserHTTP
Documentation for FallbackStore
more API docs, updated doc configs
documentation: reordered menu, added missing images (URL was pointing to remotestorage.io before), added architecture sketch, moved lib/sync to lib/store/sync