updated README with new instructions.
updated README with new instructions.

kaostao/sx,GroestlCoin/libgroestlcoin-explorer,ryancdotorg/sx,GroestlCoin/libgroestlcoin-explorer,leif/sx,libmetrocoin/libmetrocoin-explorer,tuomassiren/libbitcoin-explorer,kaostao/sx,ryancdotorg/sx,leif/sx,ryancdotorg/sx,libtetcoin/libtetcoin-explorer,BWallet/sx,GroestlCoin/libgroestlcoin-explorer,BWallet/sx,tuomassiren/libbitcoin-explorer,libtetcoin/libtetcoin-explorer,libmetrocoin/libmetrocoin-explorer,BWallet/sx,cancoin/libbitcoin-explorer,cancoin/libbitcoin-explorer,kaostao/sx,leif/sx