[ALOY-655] Provide a data- attribute support for Alloy xml

For Studio integrations, we need to be able to store meta-data about the Alloy components, ie

<Alloy>
	<Window class="container">
		<Label id="label" onClick="doClick" data-studio-id="323112">Hello, World</Label>
	</Window>
</Alloy>

This is similar to what HTML5 provides, so there appears to be other use cases for it

Tim Poulsen 2014-03-12

Can you provide more details on this? Is the request still valid? What is the use-case? Does the ID need to be unique per app, per build, per developer, globally? Does the ID need to be numeric, sequential, a GUID/hex string?
Tim Poulsen 2014-05-13

[~pinnamuri] Is this still something Studio needs? If so, can you answer the questions above?
Praveen Innamuri 2014-05-13

I don't know where did this request originated from. However, I don't think we would require this additional property specific to Studio at this moment, and that doesn't sounds right to me (unless I get to know the original use case). I would shelve this to backlog and we can prioritize it as we discover the real need for this :-)