app.js: sketching server class
server login works :)
refactored server & separated it into server.js
refactored star functions into Stars class & separated it into stars.js
bugfixes for show_star_view()
storage_{get,set}: removed 3rd param as unused
added Stars.sync(); Server now requires stars as param
2-way Stars.sync()
added Server.mtime() for t query param
prog sync tuning: server may add &server_mtime=... to "ok" reply
prettier login links
added Server.logout, removed Server.makelink
renamed Server callback functions with cb_ prefix
Server.cb_ok() regexp fixed for possible hostname inclusion