Draw2D touch version 2.9.0 released

+ new method to set the CSS style class for shapes. good for FF Chrome Safari and IE>=10 styling of SVG elements setCssClass, hasCssClass, getCssClass, addCssClass, removeCssClass, toggleCssClass
+ implement the method CommandCollection.canExecute. Just to avoid events if nothing has been changed.
+ Connection decoration inherits the color and opacity of the connection. Now the arrows or any other decoration has the same color as the connection itself
+ ports not layouted if they are added after the parent figure has been added to the canvas.