#270 [Marauroa] ContentTransfer via json

[Hendrik Brummermann]

Marauroa has a mechanism to transfer arbritrary binary content such as Stendhal zone tile data. It is offered to the client and the clients either requests transfer or declines it (e. g. if it is cashed).

The Stendhal webclient works around this missing feature by requesting zone tile files via http. But this fails for dynamically created content, (e. g. the maze and zone attributes).

[Hendrik Brummermann]

Marauroa does support content-transfer to webclients now. But Stendhal uses the Marauroa serialization to encode data before it is transmitted. So we either need pull the serialization into Marauroa or add Marauroa deserialization support to the web client.