[ALOY-697] <LeftButton> and <RightButton> not implemented in the Alloy markup

<TextField  class="formTextField" rightButtonMode="Ti.UI.INPUT_BUTTONMODE_ALWAYS">
    <RightButton>
        <Button style="Titanium.UI.iPhone.SystemButton.DISCLOSURE" />
    </RightButton>
</TextField>

[WARN] :   Attempted to load TiUIRightButtonProxy: Could not find class definition.
[ERROR] :  Script Error {
[ERROR] :      backtrace = "#0 () at file://localhost/Users/accountone/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/2319EC22-6C61-4B38-9A3E-B66D5DC847D1/spirals.app/alloy.js:72\n#1 login() at file://localhost/Users/accountone/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/2319EC22-6C61-4B38-9A3E-B66D5DC847D1/spirals.app/alloy/controllers/index.js:11\n#2 () at file://localhost/Users/accountone/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/2319EC22-6C61-4B38-9A3E-B66D5DC847D1/spirals.app/alloy/controllers/index.js:67";
[ERROR] :      line = 55;
[ERROR] :      message = "invalid method (createRightButton) passed to UIModule";
[ERROR] :      sourceId = 208900864;
[ERROR] :      sourceURL = "file://localhost/Users/accountone/Library/Application%20Support/iPhone%20Simulator/6.1/Applications/2319EC22-6C61-4B38-9A3E-B66D5DC847D1/spirals.app/alloy/controllers/login.js";
[ERROR] :  }