Add "check for updates" to menubar icon

Interfaces/MainMenu.xib

@@ -1120,6 +1120,7 @@ DQ
                 <outlet property="sendInputToAllPanes" destination="1266" id="1279"/>
                 <outlet property="sendInputToAllSessions" destination="1264" id="1278"/>
                 <outlet property="showFullScreenTabs" destination="1257" id="1260"/>
+                <outlet property="suUpdater" destination="879" id="FRj-mW-Vma"/>
                 <outlet property="toolbeltMenu" destination="1296" id="1299"/>
                 <outlet property="useTransparency" destination="1228" id="1230"/>
                 <outlet property="windowArrangementsAsTabs_" destination="z6V-EJ-Ntf" id="wse-Wc-WVw"/>

sources/iTermApplicationDelegate.m

@@ -166,6 +166,7 @@ static const NSTimeInterval kOneMonth = 30 * 24 * 60 * 60;
     IBOutlet NSMenuItem *showFullScreenTabs;
     IBOutlet NSMenuItem *useTransparency;
     IBOutlet NSMenuItem *maximizePane;
+    IBOutlet SUUpdater * suUpdater;
     IBOutlet NSMenuItem *_showTipOfTheDay;  // Here because we must remove it for older OS versions.
     BOOL secureInputDesired_;
     BOOL quittingBecauseLastWindowClosed_;
@@ -1067,6 +1068,7 @@ static const NSTimeInterval kOneMonth = 30 * 24 * 60 * 60;
 - (NSMenu *)statusBarMenu {
     NSMenu *menu = [[NSMenu alloc] init];
     NSMenuItem *item;
+
     item = [[[NSMenuItem alloc] initWithTitle:@"Preferences"
                                        action:@selector(showAndOrderFrontRegardlessPrefWindow:)
                                 keyEquivalent:@""] autorelease];
@@ -1077,6 +1079,11 @@ static const NSTimeInterval kOneMonth = 30 * 24 * 60 * 60;
                                 keyEquivalent:@""] autorelease];
     [menu addItem:item];
+    item = [[[NSMenuItem alloc] initWithTitle:@"Check For Updates"
+                                       action:@selector(checkForUpdatesFromMenu:)
+                                keyEquivalent:@""] autorelease];
+    [menu addItem:item];
+
     item = [[[NSMenuItem alloc] initWithTitle:@"Quit iTerm2"
                                        action:@selector(terminate:)
                                 keyEquivalent:@""] autorelease];
@@ -1478,6 +1485,10 @@ static const NSTimeInterval kOneMonth = 30 * 24 * 60 * 60;
     }
 }
+- (IBAction)checkForUpdatesFromMenu:(id)sender {
+    [suUpdater checkForUpdates:(sender)];
+}
+
 - (void)warnAboutChangeToDefaultPasteBehavior {
     static NSString *const kHaveWarnedAboutPasteConfirmationChange = @"NoSyncHaveWarnedAboutPasteConfirmationChange";
     if ([[NSUserDefaults standardUserDefaults] boolForKey:kHaveWarnedAboutPasteConfirmationChange]) {