gui: Embed the language files into the executable

This allows for:
- Out-of-source builds
- Easy installation

gui/gui.pro

@@ -40,6 +40,9 @@ win32 {
    }
 }
 
+# Generate the translations before we embed them
+system("lrelease gui.pro")
+
 RESOURCES = gui.qrc
 FORMS = about.ui \
         application.ui \

gui/gui.qrc

@@ -32,5 +32,18 @@
     <file alias="cfg/posix.cfg">../cfg/posix.cfg</file>
     <file alias="cfg/std.cfg">../cfg/std.cfg</file>
     <file alias="cfg/windows.cfg">../cfg/windows.cfg</file>
+
+    <file>cppcheck_de.qm</file>
+    <file>cppcheck_es.qm</file>
+    <file>cppcheck_fi.qm</file>
+    <file>cppcheck_fr.qm</file>
+    <file>cppcheck_it.qm</file>
+    <file>cppcheck_ja.qm</file>
+    <file>cppcheck_ko.qm</file>
+    <file>cppcheck_nl.qm</file>
+    <file>cppcheck_ru.qm</file>
+    <file>cppcheck_sr.qm</file>
+    <file>cppcheck_sv.qm</file>
+    <file>cppcheck_zh_CN.qm</file>
 </qresource>
 </RCC>

gui/translationhandler.cpp

@@ -97,7 +97,7 @@ bool TranslationHandler::SetLanguage(const QString &code)
         mTranslator = new QTranslator(this);
 
     //Load the new language
-    QString translationFile = "lang/" + mTranslations[index].mFilename;
+    QString translationFile = ":/" + mTranslations[index].mFilename;
     if (!mTranslator->load(translationFile) && !failure) {
         translationFile += ".qm";
         //If it failed, lets check if the default file exists