add traditional chinese support

conf/base.conf

@@ -30,7 +30,7 @@ play {
     }
   }
   i18n {
-    langs=[en,fr,ru,de,tr,sr,lv,bs,da,es,ro,it,fi,uk,pt,pl,nl,vi,sv,cs,sk,hu,ca,sl,az,nn,eo,tp,el,fp,lt,nb,et,hy,af,hi,ar,zh,gl,hr,mk,id,ja,bg,th,fa,he,mr,mn,cy,gd,ga,sq,be,ka,sw,ps,is,kk,io,gu,fo,eu,bn,id,la,jv,ky,pi,as,le,ta,sa,ml,kn,ko,mg,kb,zu,ur,yo,tl,fy,jb,tg,cv,ia]
+    langs=[en,fr,ru,de,tr,sr,lv,bs,da,es,ro,it,fi,uk,pt,pl,nl,vi,sv,cs,sk,hu,ca,sl,az,nn,eo,tp,el,fp,lt,nb,et,hy,af,hi,ar,zh,gl,hr,mk,id,ja,bg,th,fa,he,mr,mn,cy,gd,ga,sq,be,ka,sw,ps,is,kk,io,gu,fo,eu,bn,id,la,jv,ky,pi,as,le,ta,sa,ml,kn,ko,mg,kb,zu,ur,yo,tl,fy,jb,tg,cv,ia,tc]
   }
   http {
     session {

modules/i18n/messages/messages.tc

@@ -351,7 +351,6 @@ chessClock=棋鐘
 tenthsOfSeconds=十分之一秒
 never=從不
 whenTimeRemainingLessThanTenSeconds=當剩餘時間小於10秒
-horizo​​ntalGreenProgressBars=綠色橫進度條
 soundWhenTimeGetsCritical=時間不足時聲音提醒
 gameBehavior=遊戲行為
 premovesPlayingDuringOpponentTurn=預先走棋（在對手的回合走棋）

modules/i18n/src/main/MessageDb.scala

@@ -9,7 +9,7 @@ private object MessageDb {
         logger.info(s"${lap.millis}ms MessageDb")
       }
 
-  def playDefaultMessages: Map[String, String] = Map(
+  private def playDefaultMessages: Map[String, String] = Map(
     "constraint.required" -> "Required",
     "constraint.min" -> "Minimum value: {0}",
     "constraint.max" -> "Maximum value: {0}",