if I'm making this backwards incompatible, I might as well clean up the rest, 'eh?

* removed SourceRouteBlock & SourceRouteReplyMessage, as they're a redundant concept
that 1) takes up bandwidth 2) takes up CPU 3) smell funny.
now the TunnelCreateMessage includes a replyTag, replyKey, replyTunnel, and
replyGateway that they garlic encrypt their ACK/NACK through and with.

* tunnelCreateMessage doesn't need a seperate ACK - either we get a
TunnelCreateStatusMessage back or we don't.

* message structure mods for unique tunnel ID per hop (though currently all hops have
the same tunnel ID)

router/java/src/net/i2p/data/i2np/DatabaseStoreMessage.java

@@ -144,7 +144,8 @@ public class DatabaseStoreMessage extends I2NPMessageImpl {
                 byte compressed[] = new byte[compressedSize];
                 int read = DataHelper.read(in, compressed);
                 if (read != compressedSize)
-                    throw new I2NPMessageException("Invalid compressed data size");
+                    throw new I2NPMessageException("Invalid compressed data size (expected " 
+                                                   + compressedSize + " read " + read + ")");
                 ByteArrayInputStream bais = new ByteArrayInputStream(DataHelper.decompress(compressed));
                 _info.readBytes(bais);
             } else {