Add replace to Clang Query

So far you can only search with Clang Query. But we want to replace too. For that case it would be very helpful if we support regular expression.

For example find all fields and change the name from m_myVariable to my_variable and vice versa. Change the getValue() to value(), GetValue() or get_value(). We would usr the regular expression to tokenize the Clang Query matches and some actions to modify this tokens. We would provide different way to join the tokens too.

An other use case is the change of function parameters from const reference to value if the tupe size smaller than three pointer.

There should be a example result window so that you got a preview.