upgrade chess module
allow tournaments with no more than 4 players
only protect rated games against websocket hijacking
lv "latviešu valoda" translation #4451. Author: krauzand.
upgrade pgn4web
compact pgn4web
move pgn4web compiled file
es "español, castellano" translation #4468. Author: Anonymous.
ru "русский язык" translation #4472. Author: Anonymous.
fr "français" translation #4473. Author: Anonymous.
ca "Català" translation #4482. Author: Jane_Asher.
de "Deutsch" translation #4491. Author: Anonymous.
es "español, castellano" translation #4495. Author: Anonymous.
fr "français" translation #4497. Author: Anonymous.
pt "Português" translation #4516. Author: Anonymous.
pl "polski" translation #4524. Author: Anonymous.
js function param default values
Revert "js function param default values"

This reverts commit 5c77e16a568591958a53b62ccf07e8d7928b296e.
add Estonian translation for forceDraw
Merge pull request #48 from Inori/master

add Estonian translation for forceDraw