fix(lint): fix style issues

pkg/lint/lint.go

 package lint
 
+// All runs all of the available linters on the given base directory.
 func All(basedir string) []Message {
 	out := Chartfile(basedir)
 	out = append(out, Templates(basedir)...)

pkg/lint/message.go

@@ -2,16 +2,22 @@ package lint
 
 import "fmt"
 
+// Severity indicatest the severity of a Message.
 type Severity int
 
 const (
+	// UnknownSev indicates that the severity of the error is unknown, and should not stop processing.
 	UnknownSev = iota
+	// WarningSev indicates that something does not meet code standards, but will likely function.
 	WarningSev
+	// ErrorSev indicates that something will not likely function.
 	ErrorSev
 )
 
+// sev matches the *Sev states.
 var sev = []string{"INFO", "WARNING", "ERROR"}
 
+// Message is a linting output message
 type Message struct {
 	// Severity is one of the *Sev constants
 	Severity int

pkg/lint/template.go

@@ -10,6 +10,7 @@ import (
 	"github.com/Masterminds/sprig"
 )
 
+// Templates lints a chart's templates.
 func Templates(basepath string) (messages []Message) {
 	messages = []Message{}
 	path := filepath.Join(basepath, "templates")