Updated form rendering docs. Minor changes to some form types.
Reworked SelectOrAdd form type.
Added the "addButton" option to determine whether or not to display the button for adding an entity on the fly next to the select box.
This is useful if the model needs the searchable (typeahead) functionality but not the add functionality.
Added table row view behavior to the work model.
Added the "isWorkSelectable" option to allow neat embedding into work forms (where the work id becomes clear from the editing context).
Extended the work and personwork form types.