Merge branch '14-qt4-build-failure' into 'master'

Resolve "Qt4 build failure"

Closes #14

See merge request !10

src/common/Session.cpp

@@ -307,14 +307,8 @@ Palette *Session::get_palette(const std::string &type, const std::string &palett
 
         p = new Palette(string(type+"/"+palette_name));
         *where_from = p;
-#if defined(USE_QT5)
-        for(QMap<QString, QVariant>::const_iterator it = qmap.cbegin() ;
-            it != qmap.cend() ; ++ it)
-#else
-        for(QMap<QString, QVariant>::const_iterator it = qmap.begin() ;
-            it != qmap.end() ; ++ it)
-#endif
-        {
+        for(QMap<QString, QVariant>::const_iterator it = qmap.constBegin() ;
+            it != qmap.constEnd() ; ++ it) {
             const QColor qc = it.value().value<QColor>();
             Color c = Color(qc.red()/255., qc.green()/255., qc.blue()/255.);
             p->add_state(it.key().toStdString(), c, qc.alpha()==255.);