added method location= and revised location to handle missing fields better

lib/jam_ruby/models/user.rb

@@ -106,7 +106,18 @@ module JamRuby
     end
 
     def location
-      return "#{self.city}, #{self.state}, #{self.country}"
+      loc = self.city.blank? ? '' : self.city
+      loc = loc.blank? ? self.state : "#{loc}, #{self.state}" unless self.state.blank?
+      loc = loc.blank? ? self.country : "#{loc}, #{self.country}" unless self.country.blank?
+      loc
+    end
+
+    def location= location_hash
+      unless location_hash.blank?
+        self.city = location_hash[:city]
+        self.state = location_hash[:state]
+        self.country = location_hash[:country]
+      end if self.city.blank?
     end
 
     def should_validate_password?