Make C++ code style configurable.

Change-Id: Iaf08edb2361146e6b5e1cbafdb716a23c938875b
Done-with: Jarek Kobus
Task-number: QTCREATORBUG-2670
Task-number: QTCREATORBUG-4310
Task-number: QTCREATORBUG-2763
Task-number: QTCREATORBUG-3623
Task-number: QTCREATORBUG-567
Reviewed-on: http://codereview.qt.nokia.com/74
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>
Reviewed-by: Jarek Kobus <jaroslaw.kobus@nokia.com>
Reviewed-by: Roberto Raggi <roberto.raggi@nokia.com>

src/plugins/cpptools/cpptoolsplugin.h

@@ -51,6 +51,9 @@ class QDir;
 QT_END_NAMESPACE
 
 namespace CppTools {
+
+class CppToolsSettings;
+
 namespace Internal {
 
 class CppModelManager;
@@ -81,6 +84,7 @@ private:
 
     CppModelManager *m_modelManager;
     QSharedPointer<CppFileSettings> m_fileSettings;
+    CppToolsSettings *m_settings;
 
     static CppToolsPlugin *m_instance;
 };