Add Capability enum and getter, use version 0.4.9.1
Add Capability enum and getter, use version 0.4.9.1

bitsquare/bitsquare,ManfredKarrer/exchange,haiqu/bitsquare,bisq-network/exchange,bisq-network/exchange,sakazz/exchange,ManfredKarrer/exchange,haiqu/bitsquare,bitsquare/bitsquare,sakazz/exchange