Allow suppression (i.e., hiding of) country field in forms

Need to add to settings page an option for suppressing display of the country field in search forms.

This is really a subtask of a greater task that needs to be completed first: We need to change location.module so that the default work flow has a single checkbox for enabling address collection and so that if this box is checked, the site admin is forced to select "Allow" or "Required" for the country field (while it is clear to the user that the country can be hidden and forced to a default value in the settings page.

-Ankur