Convert forms to ajax

http://manage.dimagi.com/default.asp?115095

Changed each form to submit asynchronously.

It now tracks changes for the other two forms as well and tells the user what has been saved successfully.
is there a reason these are human readable, as opposed to more slug-like? also is there a reason for the above choice of initialization? I would have expected something like:
```
var unsavedChanges = { 'settings': false, 'data': false, 'membership': false}
```