upgrade chess module
start analysis exploration
remove extra redraw
more progress on analysis exploration
complete analysis exploration, fix JS mutability
upgrade JS chess to fix chess960 castle bug
upgrade chessli and puzzles
Merge branch 'master' of github.com:ornicar/lila

* 'master' of github.com:ornicar/lila:
  Neaten messages power tip
  Ensure count never falls below zero
  Iron out more bugs
  Fix mistakes, neaten code
  Challenge notifications drop-down
  Sleeker challenge notification
  Add data-hint to bookmark button
  Lower sound play frequency
  If you can't fix it, make it look intentional