i18n: better error handling
rename 'add feeds' to 'detect feeds' in opaddnew
add a welcome-screen explaining the basic stuff in skyrss, redirect the users after creating account
add link to first steps to menu
i18n jump on open setting
js: focus share-window so that esc works properly
rewrite i18n to use browser language instead of appconfig.lang
move JS config from php to native cacheable JS