Added database changes to CHANGELOG

Removed explanatory text for updating (now in CHANGELOG)
Added new outcomes to databasestrings
Updated database schema to be as consistent as possible with original database

admin/databasestrings.php

@@ -88,5 +88,7 @@ T_("Respondent last name");
 T_("Email address");
 T_("Self completion email invitation sent");
 T_("Self completed online");
+T_("Max call attempts reached");
+T_("Max calls reached");
 
 ?>