Crypto-Trade.com v2.0 API updates; CryptoTradeException; getTickers()

Issue #631 - Fixed Crypto-Trade implementation:
- added CryptoTradeException (to deserialize http-400 w/ response body)
- fixed place order API calls (different Bought vs Sold json responses)
- added multi-currency method, getTickers()
- finished orderInfo implementation (updated orderHistory method)
- updated examples & json test resource files
- enhanced CurrencyPairDeserializer