rewrite all config persistence, bypassing JSON conversions
migrate mongodb config numbers to ints
filter correspondence games, more config DB migration
Merge branch 'master' into notes

* master:
  filter correspondence games, more config DB migration
  migrate mongodb config numbers to ints
  rewrite all config persistence, bypassing JSON conversions
Merge branch 'notes' of github.com:ornicar/lila into notes

* 'notes' of github.com:ornicar/lila:
  Fix mouse-over display bug
  Notes seem prod ready
guard rail on note persistence