Changes

* '''Ajax''': Option to select if users wishes to have an Ajax Organization name lookup, allowing for the quick selection of organizations from those already found in the system. Additional options are exposed when configuring the sign-up page.** ''Lookup Category'': Allows selection of the [[Client Categories|categories]] of organizations in the system that should be returned by the Ajax search. Will return all organizations regardless of category if left blank. ** ''Lookup Status'': Allows selection of the [[Status|statuses]] of organizations in the system that should be returned by the Ajax search. Will return all organizations regardless of status if left blank.  When the Sign-up page is generated then the user simply types in some text and is presented with matching options, which they click on to select.