Started working on displaying user avatars

Currently the downloading and displaying of avatar images is working,
however we now need to fetch the author avatar url from the forum.

Signed-off-by: Ricky Barrette <rickbarrette@gmail.com>

OSJ Forum/src/com/commonsware/cwac/thumbnail/ThumbnailBus.java

@@ -0,0 +1,36 @@
+/***
+	Copyright (c) 2008-2009 CommonsWare, LLC
+	
+	Licensed under the Apache License, Version 2.0 (the "License"); you may
+	not use this file except in compliance with the License. You may obtain
+	a copy of the License at
+		http://www.apache.org/licenses/LICENSE-2.0
+	Unless required by applicable law or agreed to in writing, software
+	distributed under the License is distributed on an "AS IS" BASIS,
+	WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+	See the License for the specific language governing permissions and
+	limitations under the License.
+ */
+
+package com.commonsware.cwac.thumbnail;
+
+import com.commonsware.cwac.bus.AbstractBus;
+
+public class ThumbnailBus extends AbstractBus<ThumbnailMessage, String, ThumbnailBus.MatchStrategy> {
+	class MatchStrategy implements AbstractBus.Strategy<ThumbnailMessage, String> {
+		@Override
+		public boolean isMatch(final ThumbnailMessage message, final String filter) {
+			return filter != null && message != null && filter.equals(message.getKey());
+		}
+	}
+
+	public ThumbnailBus() {
+		super();
+
+		setStrategy(new MatchStrategy());
+	}
+
+	public ThumbnailMessage createMessage(final String key) {
+		return new ThumbnailMessage(key);
+	}
+}