Adds a round robin and random mode to export buses.

Resolves #85

src/api/java/appeng/api/config/SchedulingMode.java

@@ -0,0 +1,30 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013 AlgorithmX2
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package appeng.api.config;
+
+
+public enum SchedulingMode
+{
+	DEFAULT, ROUNDROBIN, RANDOM
+}

src/api/java/appeng/api/config/Settings.java

@@ -54,13 +54,15 @@ public enum Settings
 
 	INTERFACE_TERMINAL( EnumSet.of( YesNo.YES, YesNo.NO ) ), CRAFT_VIA_REDSTONE( EnumSet.of( YesNo.YES, YesNo.NO ) ),
 
-	STORAGE_FILTER( EnumSet.allOf( StorageFilter.class ) ), PLACE_BLOCK( EnumSet.of( YesNo.YES, YesNo.NO ) );
+	STORAGE_FILTER( EnumSet.allOf( StorageFilter.class ) ), PLACE_BLOCK( EnumSet.of( YesNo.YES, YesNo.NO ) ),
+
+	SCHEDULING_MODE( EnumSet.allOf( SchedulingMode.class ) );
 
 	private final EnumSet<? extends Enum<?>> values;
 
 	Settings( @Nonnull EnumSet<? extends Enum<?>> possibleOptions )
 	{
-		if ( possibleOptions.isEmpty() )
+		if( possibleOptions.isEmpty() )
 		{
 			throw new IllegalArgumentException( "Tried to instantiate an empty setting." );
 		}