try to render the user ELO history with highstock
user ELO history chart with highcharts
Merge branch 'master' into highchart

* master:
  fa "فارسی" translation #4670. Author: happy emad. 31 to 33, i've changed them
  it "Italian" translation #4668. Author: iamdudum.
  id "Bahasa Indonesia" translation #4665. Author: Andry.
  document move streaming
  register players IP addresses and send them in move stream
  stream played moves
apply jshint
improve charts