HtmlTextInput cannot show SoftKeyboard in safari on iOS9.1(branch zebkit-next-generation)

[jfojfo]

if comment out e.preventDefault() or change it to e.stopPropagation() in PointerEventUnifier, keyborad will show normally.

element.addEventListener("touchstart", function(e){
   ...
   //e.preventDefault();
   e.stopPropagation();
});
element.addEventListener("touchend", function(e){
   ...
   //e.preventDefault();
   e.stopPropagation();
});
element.addEventListener("touchmove", function(e){
   ...
   //e.preventDefault();
   e.stopPropagation();
});

testing code follows:

    eval(zebra.Import("ui", "layout"));

    var root = new zCanvas(400, 400).root;
    root.setPadding(8);
    root.setBorder("plain");
    root.setBackground("#EEEEEE");
    root.setLayout(new BorderLayout(4,4));
    root.add(LEFT, new HtmlTextArea("HTML text area"));
    root.add(TOP, new HtmlTextField("HTML input field"));
    root.add(CENTER, new TextArea("Zebra text area"));
    root.add(BOTTOM, new Button("Test"));

[jfojfo]

only deal with input and textarea

// in PointerEventUnifier:
                element.addEventListener("touchstart", function(e) {
                    ...

                    var tagName = e.target.tagName.toLowerCase();
                    if (tagName !== 'input' && tagName !== 'textarea' || e.target.hasAttribute('readonly')) {
                        e.preventDefault();
                    }

                }, false);

                element.addEventListener("touchend", function(e) {
                    ...

                    var tagName = e.target.tagName.toLowerCase();
                    if (tagName !== 'input' && tagName !== 'textarea' || e.target.hasAttribute('readonly')) {
                        e.preventDefault();
                    }

                }, false);

[jfojfo]

fixed many problems in my branch, see https://github.com/jfojfo/zebra