add empty Divider with some tests
Merge branch 'master' of github.com:ornicar/scalachess

* 'master' of github.com:ornicar/scalachess: (38 commits)
  stop keeping track of taken pieces
  cleaned up the Indian Games
  turns out everyone was wrong about it in the end
  correct code for East Indian Defense (A48 vs E00)
  corrected name of 1. e3
  corrected East Indian Defense
  fix FEN reader
  Status.name first letter is lowered
  Status.lowerName
  thread safety with MessageDigest
  rename ambiguous variable names
  read up to 600 moves
  always show condensed clock
  implement partial PGN binary reads
  refactor Speed and Variant
  add variant short names
  add Speed and Variant keys
  implement three-check chess
  rename King of the Hill
  s/Slow/Classical
  ...