Enable code coverage.
Enable code coverage.

tuomassiren/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,cancoin/libbitcoin-explorer,cancoin/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,GroestlCoin/libgroestlcoin-explorer,tuomassiren/libbitcoin-explorer