QMap does not support C++11 initializer list

With -std=c++0x enabled, the following code compiles OK:

	std::map<int, std::string> m {{1, "1"}, {2, "2"}};

while this doesn't:

	QMap<int, QString> m {{1, "1"}, {2, "2"}};

Initializer list support is in QList and QVector. QMap shouldn't be left out.