[bittrex] metadata - added missing ccy
[bittrex] metadata - added missing ccy

Panchen/XChange,andre77/XChange,evdubs/XChange,ww3456/XChange,nopy/XChange,chrisrico/XChange,LeonidShamis/XChange,TSavo/XChange,douggie/XChange,timmolter/XChange,npomfret/XChange,stachon/XChange