more appletv tweaks (#351)

* redo now playing indicator

- instead of drawing an arrow overlay, add an offset green shadow

* do not show "Connection Terminated" on code 0

if an application quits successfully because it was asked to do so by
the user (errorCode = 0), then do not display an alert -- just go back
to the prior view.

* fix: add missing toggle for mutli-controller support

Moonlight TV/Settings.bundle/Root.plist

@@ -56,6 +56,16 @@
 			<key>DefaultValue</key>
 			<false/>
 		</dict>
+		<dict>
+			<key>Type</key>
+			<string>PSToggleSwitchSpecifier</string>
+			<key>Title</key>
+			<string>Enable multi-controller support</string>
+			<key>Key</key>
+			<string>multipleControllers</string>
+			<key>DefaultValue</key>
+			<true/>
+		</dict>
 		<dict>
 			<key>Type</key>
 			<string>PSGroupSpecifier</string>