Comment more packages to pass go lint

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

progress/bar.go

@@ -16,6 +16,7 @@ type Bar float64
 
 var _ fmt.Formatter = Bar(1.0)
 
+// Format the progress bar as output
 func (h Bar) Format(state fmt.State, r rune) {
 	switch r {
 	case 'r':

progress/humaans.go

@@ -10,16 +10,20 @@ import (
 // Bytes converts a regular int64 to human readable type.
 type Bytes int64
 
+// String returns the string representation of bytes
 func (b Bytes) String() string {
 	return units.CustomSize("%02.1f %s", float64(b), 1024.0, []string{"B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB", "ZiB", "YiB"})
 }
 
+// BytesPerSecond is the rate in seconds for byte operations
 type BytesPerSecond int64
 
+// NewBytesPerSecond returns the rate that n bytes were written in the provided duration
 func NewBytesPerSecond(n int64, duration time.Duration) BytesPerSecond {
 	return BytesPerSecond(float64(n) / duration.Seconds())
 }
 
+// String returns the string representation of the rate
 func (bps BytesPerSecond) String() string {
 	return fmt.Sprintf("%v/s", Bytes(bps))
 }

progress/writer.go

@@ -16,12 +16,14 @@ type Writer struct {
 	lines int
 }
 
+// NewWriter returns a writer
 func NewWriter(w io.Writer) *Writer {
 	return &Writer{
 		w: w,
 	}
 }
 
+// Write the provided bytes
 func (w *Writer) Write(p []byte) (n int, err error) {
 	return w.buf.Write(p)
 }