remove unused opening configuration
we don't need to know the opening ply
add nowPlaying API color attr
Merge branch 'master' of ../lila

* 'master' of ../lila:
  we don't need to know the opening ply
  remove unused opening configuration
  upgrade for latest mithril: window.m is no longer a thing
  mithril 0.1.27 and chessground 1.8.1
  sk "slovenčina" translation #10932. Author: xslyepov.
  sk "slovenčina" translation #10931. Author: xslyepov.
  le "1337" translation #10928. Author: Chess_Agent. Finished the last five sentences.
  de "Deutsch" translation #10927. Author: Dolg. 99 I guess it's the possibility to reset the password. Right now it means that it were reset already.
  ar "العربية" translation #10926. Author: Abd0.
  uk "українська" translation #10925. Author: IvTK.
  la "lingua Latīna" translation #10924. Author: Dr_King_Schultz.
  hu "Magyar" translation #10923. Author: Nigel-727.
  sl "slovenščina" translation #10922. Author: woodswoods. Better words  for certain translations in contex.
  is "Íslenska" translation #10920. Author: hjortur.
  da "Dansk" translation #10919. Author: KillerDwarf.
  lv "latviešu valoda" translation #10918. Author: krauzand.
  ru "русский язык" translation #10915. Author: XuMEPA.
  add donor star to server providers
Merge branch 'master' of github.com:ornicar/lila

* 'master' of github.com:ornicar/lila:
  Correct grammar error in emailIsOptional string