Support C++11 syntax

The following code is valid C++11 and does compile. However, QtCreator marks the line "using..." as wrong with the message

expected token `;' got `='

template <class F>
class Foo
{

};

class Bar
{

};

using Baz = Foo<Bar>;

In the following code sample, QtCreator marks the line "void do_stuff..." as wrong with the error message

unexpected token `int'

template <class F>
class Foo
{

};

template <class B>
class Bar
{

};

class Baz
{

};

void do_stuff(int x, Foo<Bar<Baz>> y)
{

}