Adapt to ticker for itbit
Merge pull request #568 from jamespedwards42/develop

Expose Poloniex bulk ticker and depth calls through raw service.
Fix merge conflict
Remove typos
Set authHost to api.itbit.com by default instead of beta
Make use of parseDate
Fixed date adapter
Merge pull request #570 from zholmes1/develop

Fixed date adapter
Merge pull request #569 from jheusser/itbit_ticker

ItBit: support for Ticker
Implement Poloniex returnCurrencies method.