Reworked how requests to Cryptsy are generated, to minimise code duplication.
Continued streamlining of code to call Cryptsy API, in particular request generation and parsing.
Added code for generating new addresses to deposit to.
Converted methods in CryptsyExchange which do not require fields on the object, to static.
Adapted return value for market depth to be a buy/sell book, rather than a single list of depth.
Completed first draft of the Cryptsy exchange.