translation handling improvements

- automatically build binary translation files in qmake/make
- roll translations into resource file and executable, to simply installation

src/qt/bitcoin.cpp

@@ -120,7 +120,7 @@ int main(int argc, char *argv[])
     // Load language file for system locale
     QString locale = QLocale::system().name();
     QTranslator translator;
-    translator.load("bitcoin_"+locale);
+    translator.load(":/translations/"+locale);
     app.installTranslator(&translator);
 
     QSplashScreen splash(QPixmap(":/images/splash"), 0);

src/qt/bitcoin.qrc

@@ -45,4 +45,9 @@
     <qresource prefix="/movies">
         <file alias="update_spinner">res/movies/update_spinner.mng</file>
     </qresource>
+    <qresource prefix="/translations">
+        <file alias="de_DE">locale/bitcoin_de.qm</file>
+        <file alias="nl_NL">locale/bitcoin_nl.qm</file>
+        <file alias="ru_RU">locale/bitcoin_ru.qm</file>
+    </qresource>
 </RCC>