Changed the root package from net.sf.briar to org.briarproject.

briar-api/src/org/briarproject/api/messaging/Ack.java

@@ -0,0 +1,18 @@
+package org.briarproject.api.messaging;
+
+import java.util.Collection;
+
+/** A packet acknowledging receipt of one or more {@link Message}s. */
+public class Ack {
+
+	private final Collection<MessageId> acked;
+
+	public Ack(Collection<MessageId> acked) {
+		this.acked = acked;
+	}
+
+	/** Returns the identifiers of the acknowledged messages. */
+	public Collection<MessageId> getMessageIds() {
+		return acked;
+	}
+}