Added Korean flag and some translated strings

Added translation of some new strings and svg file of South Korean flag.

Flag of South Korea is from
http://commons.wikimedia.org/wiki/File:Flag_of_South_Korea.svg

cockatrice/cockatrice.qrc

@@ -81,6 +81,7 @@
     <file>resources/countries/il.svg</file>
     <file>resources/countries/it.svg</file>
     <file>resources/countries/jp.svg</file>
+    <file>resources/countries/kr.svg</file>
     <file>resources/countries/lt.svg</file>
     <file>resources/countries/lu.svg</file>
     <file>resources/countries/lv.svg</file>

cockatrice/resources/countries/kr.svg

+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="900" height="600" viewBox="-36 -24 72 48">
+<title>Flag of South Korea</title>
+<rect fill="#fff" x="-36" y="-24" width="72" height="48"/>
+<g transform="rotate(-56.3099325)"><!--arctan(-3/2)-->
+<g id="b2"><path id="b" d="M-6-25H6M-6-22H6M-6-19H6" stroke="#000" stroke-width="2"/>
+<use xlink:href="#b" y="44"/></g>
+<path stroke="#fff" stroke-width="1" d="M0,17v10"/>
+<circle fill="#c60c30" r="12"/>
+<path fill="#003478" d="M0-12A6,6 0 0 0 0,0A6,6 0 0 1 0,12A12,12 0 0,1 0-12Z"/></g>
+<g transform="rotate(-123.6900675)"><use xlink:href="#b2"/>
+<path stroke="#fff" stroke-width="1" d="M0-23.5v3M0,17v3.5M0,23.5v3"/></g></svg>
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