[hitbtc] Fix clientOrderId for DOGE, add tests
[hitbtc] Fix lot multipliers for currencies, change order quantity to BigInteger
Merge pull request #651 from rafalkrupinski/fix-hitbtc

Fix HitBTC
Make market order order type configurable
Merge pull request #652 from jheusser/bf_marginmarket

Bitfinex: make market order ordertype configurable (margin/exchange)
[BTCChina] Remove null from signature message.
Merge pull request #654 from sutra/develop

[BTCChina] Remove null from signature message.
[Poloniex] Switched Ticker volume to baseSymbol
[MintPal] Switched Ticker volume to baseSymbol
Merge pull request #655 from zholmes1/develop

Fixed Ticker volume currency on Poloniex and MintPal