handle duplicate event name issues

When adding a duplicate event name, website errors and display blank page. Put in logic to give user appropriate message. Also added additional admins. Also commented out single sign out function since it is commented out on production right now (so I can apply changes to the index file).

include/events.class.php

@@ -104,13 +104,19 @@ class Events
 			'grad_credit' => $grad_credit,
 			'semester_code' => $_SESSION['semester_code']
 		);
-		auto_insert( $this->db, 'events', $data );
-		$data['event_id'] = $this->db->Insert_ID();
-        if ( $this->sqlite ) {
-		    auto_insert( $this->sqlite, 'events', $data );
-        }
-		
-		return true;
+
+		$event = get_event_by_name($data['name']);
+		if ($event) {
+			//throw new Exception('Event name already exists!');
+			return false;
+		} else {
+			auto_insert( $this->db, 'events', $data );
+			$data['event_id'] = $this->db->Insert_ID();
+			if ( $this->sqlite ) {
+				auto_insert( $this->sqlite, 'events', $data );
+			}
+			return true;
+		}
 	}
 	
 	public function edit_event( $id, $name, $start_time, $end_time, $ugrad_credit, $grad_credit )