Add XRP trade books,  scale & default fees @ bitstamp hard-coded json
Add XRP trade books,  scale & default fees @ bitstamp hard-coded json

dozd/XChange,npomfret/XChange,chrisrico/XChange,timmolter/XChange,LeonidShamis/XChange,ww3456/XChange,douggie/XChange,TSavo/XChange,stachon/XChange,anwfr/XChange,Panchen/XChange,andre77/XChange,nopy/XChange,stevenuray/XChange,evdubs/XChange,gaborkolozsy/XChange