Coinffeine/coinffeine — pull request #224 by gotoalberto (2014-07-04 08:26:19+00:00)
Title: Add support to serialize and expose the order book

**Description**:
- Added OpenOrders case class to expose the orders in a OrderBook.
- Added Protobuf and conversion from/to protobuf support on DefaultProtoMappings
- Implemented Unit Tests to test the messages.

**Testing** : UT Test pass.