SDL: removed Proguard check, fixed build scripts

changeAppSettings.sh

@@ -1130,17 +1130,6 @@ else
 	done
 
 	$SEDI "s/==GOOGLEPLAYGAMESERVICES_APP_ID==/$GooglePlayGameServicesId/g" project/res/values/strings.xml
-
-	PROGUARD=`which android`
-	[ -z "$PROGUARD" ] && PROGUARD=$ANDROID_SDK_ROOT/tools/android
-	PROGUARD=`dirname $PROGUARD`/proguard/lib/proguard.jar
-	java -jar $PROGUARD | grep 'ProGuard, version 5.3' || {
-		echo "Error: ProGuard is too old"
-		echo "You need to update ProGuard. Download it here:"
-		echo "https://sourceforge.net/projects/proguard/files/proguard/5.3/proguard5.3.3.zip"
-		echo "Unpack it, then place file proguard.jar to $PROGUARD"
-		#exit 1
-	}
 fi
 
 if [ -e "project/jni/application/src/AndroidData/assetpack" ] ; then