It only works inside an iframed gadget.

Until better explanations are provided.

Add an example of renderjs usage.

Use it to simplify the implementation of the default accessor.

Provide a better html parsing, to continue working on renderJS itself.

Allow to fetch HTML gadget and all its requirements.

GadgetIndex representation.
Adding a new tab should rmove existing gadget and its representation.

render gadget immediately.

so they don't become orphans.
TabbulkarGadget keeps track of most recent gadget being used and cleans
it up when new one is added, thus reducing trash in Gadgetindex and DOM.