Remove _SCL_SECURE_NO_WARNING from VS props (boost bug).
Remove _SCL_SECURE_NO_WARNING from VS props (boost bug).

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