Typed events.
Merge pull request #44 from ocsigen/event_handler

Typed events.
Add img and dl types. Change (audio|video)_interactive types.

The audio and video types are now only for the non-interactive version.
There is an interactive version which is valid for both versions.
Merge pull request #45 from ocsigen/dl_img_interactive

Add img and dl types. Change (audio|video)_interactive types.
new tyxml wrapping
update wrt comments
wrap: concat -> append
singleton + functionnal nil (temp?)