Support for static page creation

* Add helpers to StaticPage model and use them in existing view
* "field" template tag uses new data_type "long_string" for "TextField" fields; templates render it as &lt;textarea&gt;
* When inlineEditForm.js moves a field value to a display value, use text() instead of html() so HTML characters will be escaped
Merge pull request #1145 from RickMohr/static-page-support

Support for static page creation