sort command list in help alphabetically.
sort command list in help alphabetically.

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