[javascript] make inlinedform-added event bindable $(form).trigger('inlinedform-added') was not usable since form had no existence outside the inner callback. Use the general CubicWeb object to trigger the event so it's easy to bind a callback wherever it's needed.

This directory is where you should put your lax components.

For your application to actually use a component, you also 
have to modify the ``INCLUDED_COMPONENTS`` variable in 
the ``custom.py`` module.