Fix and bulletproof osx packaging script; cleanup some obsolete .gitignore entries

packaging/osx/template.app/Contents/MacOS/display_error

@@ -0,0 +1,37 @@
+#!/bin/bash
+# Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+# This file is part of OpenRA.
+# 
+#  OpenRA is free software: you can redistribute it and/or modify
+#  it under the terms of the GNU General Public License as published by
+#  the Free Software Foundation, either version 3 of the License, or
+#  (at your option) any later version.
+# 
+#  OpenRA is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+# 
+#  You should have received a copy of the GNU General Public License
+#  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+#
+
+# Internal options
+RESOURCES_PATH=`pwd`/../Resources
+
+# Display an error to the user and exit
+# args:
+#    $1: title
+#    $2: message
+
+`/usr/bin/osascript << EOT
+	tell application "Finder" 
+		activate
+		display dialog "${2}\n\nSupport is available in our irc channel irc.freenode.net #openra." \
+		buttons "Quit" \
+		default button 1 \
+		with title "${1}" \
+		with icon alias (POSIX file "$RESOURCES_PATH/OpenRA.icns")
+		activate
+		end tell
+EOT`