[Vala] #region example class

[Clément David <c david86 gmail com>]

 Here it's an Example Class that use #region :

    public class FooBar
    {
        #region Private Members

        private double foo;

        #endregion

        #region Constructors
        
        construct {
                foo = 3.14;
        }

        FooBar () {}

        #endregion

        #region Public Fonction

        int bar() { return (int)foo; }

        #endregion
}