gofat - List size of golang dependencies

Based on https://github.com/jondot/fattyproject/blob/master/gofat and adjusted to work with go 1.11 (more or less)

Example

    gofat

    3.3M
    importmap golang_org/x/net/http/httpguts=vendor/golang_org/x/net/http/httpguts
    2.9M
    1.6M
    importmap golang_org/x/net/dns/dnsmessage=vendor/golang_org/x/net/dns/dnsmessage
    1.4M
    1.2M
    1.1M
    948K
    920K
    importmap github.com/c9s/goprocinfo/linux=github.com/cilium/cilium/vendor/github.com/c9s/goprocinfo/linux
    912K
    importmap golang_org/x/crypto/chacha20poly1305=vendor/golang_org/x/crypto/chacha20poly1305