1) Deleted in-place-editing. We'll be replacing this with a real edit
system that groups settings together and is more coherent.
2) Tweaked the way that dialog boxes work to get the ajax stuff working
again. It's imperfect and does not work properly for uploading images.
This is going to get redone also, but this is a good resting point.
3) Created edit forms for albums and photos. Moved _update and _create out
of Items_Controller and into the individual subclasses.
4) Created access::required which is a shorthand for:
if (!access::can(...)) {
access::forbidden();
}
5) Added validation rules to Items_Model
6) Converted login to use the regular modal dialog approach in the theme.
* Remove user registration link and popup from the theme; this
shouldn't be done in a popup. Use ajaxform to simplify the way
that we load the login popup.
* Create form.html.php, this is a template for Forge based forms.
* Move user validation rules into User_Model and let forms
populate the rules into their forms as useful.
* Undo r18688's changes regarding the REST code. We should never
accept a null resource, this breaks the REST abstraction.
* Change login and user controllers to use Forge which lets us delete
login.html.php and user.html.php since those now are generated by
the theme-owned form template
