Adapt to ticker for itbit
Initial effort to add Bitfinex Total Return Swaps capability to XChange.
This implementation currently has tested the raw functions related to 
getting the active swaps order book, sending offers (a swap order in BFX
API terminology), retrieving responses, and cancelling offers. This work
has not been exposed through the generic TradeServices as I would like
to make sure that it is acceptable to add these loan types to the
generic interfaces (and have a bunch of NotImplementedExceptions).
Merge remote-tracking branch 'upstream/develop'

Conflicts:
	xchange-bitfinex/src/main/java/com/xeiam/xchange/bitfinex/v1/service/polling/BitfinexTradeServiceRaw.java
Add example lend book demo
Make sure the print statement accurately describes the USD swap order
book
Include appropriate MIT header
ensure comment correctly states BFX as the exchange we're retrieving the
instance of.
Add Bittrex bulk tickers response.
Merge remote-tracking branch 'upstream/develop' into develop
Poloniex Market Data Implementation
Begin Poloniex Authenticated Implementaion
Fixed BittrexTrade Adapter

Was checking wrong case and always creating ask trades.
Prepared Poloniex for Pull Request

Added license, fixed inconsistencies, commented out attempt at
authenticated methods
Merge remote-tracking branch 'upstream/develop'
Merge pull request #559 from kpysniak/itbit

Added value factory for itbit nonces.
Poloniex Authenticated Attempt
Merge remote-tracking branch 'upstream/develop' into develop
Remove copyright header.
Merge pull request #561 from jamespedwards42/develop

Add bulk ticker retrieval for Bittrex
Fix Bittrex Trade OrderType Adaption