See,

$ gometalinter --vendor --deadline 10m --disable-all --enable=golint  ./...
encoding.go:15:1:warning: comment on exported function GetRandomString should be of the form "GetRandomString ..." (golint)
encoding.go:30:1:warning: exported function EncodePassword should have comment or be unexported (golint)
encoding.go:35:1:warning: comment on exported function EncodeMd5 should be of the form "EncodeMd5 ..." (golint)
encoding.go:42:1:warning: comment on exported function PBKDF2 should be of the form "PBKDF2 ..." (golint)
encoding.go:80:1:warning: exported function GetBasicAuthHeader should have comment or be unexported (golint)
encoding.go:85:1:warning: exported function DecodeBasicAuthHeader should have comment or be unexported (golint)
encoding.go:105:1:warning: exported function RandomHex should have comment or be unexported (golint)
encryption.go:14:1:warning: exported function Decrypt should have comment or be unexported (golint)
encryption.go:39:1:warning: exported function Encrypt should have comment or be unexported (golint)
ip.go:7:1:warning: exported function SplitIpPort should have comment or be unexported (golint)
json.go:3:6:warning: exported type DynMap should have comment or be unexported (golint)
md5.go:22:1:warning: comment on exported function Md5SumString should be of the form "Md5SumString ..." (golint)
strings.go:10:1:warning: exported function StringsFallback2 should have comment or be unexported (golint)
strings.go:14:1:warning: exported function StringsFallback3 should have comment or be unexported (golint)
strings.go:27:1:warning: exported function SplitString should have comment or be unexported (golint)
strings.go:35:1:warning: exported function GetAgeString should have comment or be unexported (golint)
url.go:8:6:warning: exported type UrlQueryReader should have comment or be unexported (golint)
url.go:12:1:warning: exported function NewUrlQueryReader should have comment or be unexported (golint)
url.go:23:1:warning: exported method UrlQueryReader.Get should have comment or be unexported (golint)
url.go:32:1:warning: exported function JoinUrlFragments should have comment or be unexported (golint)
validation.go:16:1:warning: exported function IsEmail should have comment or be unexported (golint)