Coding Style: Update to MSVC 2013, g++ 4.7, clang 3.1

And add stub texts for scoped enums, initializer list and delegating
constructors.

Change-Id: Ic1f9b97b09fa62b890ea3b7be4f2315ea1a72576
Reviewed-by: Alex Blasche <alexander.blasche@theqtcompany.com>
Reviewed-by: hjk <hjk@theqtcompany.com>

doc/api/coding-style.qdoc

@@ -758,7 +758,7 @@
 
     \section2 C++11 Features
 
-    Code should compile with Microsoft Visual Studio 2010, g++ 4.5, and Clang 3.1.
+    Code should compile with Microsoft Visual Studio 2013, g++ 4.7, and Clang 3.1.
 
     \section3 Lambdas
 
@@ -879,6 +879,23 @@
 
     \endlist
 
+    \section3 Scoped enums
+
+    You can use scoped enums in places where the implicit conversion to int of unscoped enums is
+    undesired or the additional scope is useful.
+
+    \section3 Delegating constructors
+
+    Use delegating constructors if multiple constructors use essentially the same code.
+
+    \section3 Initializer list
+
+    Use initializer lists to initialize containers, for example:
+
+    \code
+    const QVector<int> values = {1, 2, 3, 4, 5};
+    \endcode
+
     \section2 Using QObject
 
     \list