Bump spf13/pflag

Godeps/_workspace/src/github.com/spf13/pflag/.travis.yml

@@ -5,6 +5,7 @@ language: go
 go:
         - 1.3
         - 1.4
+        - 1.5
         - tip
 
 install:

Godeps/_workspace/src/github.com/spf13/pflag/string_slice.go

@@ -1,6 +1,7 @@
 package pflag
 
 import (
+	"encoding/csv"
 	"fmt"
 	"strings"
 )
@@ -21,7 +22,12 @@ func newStringSliceValue(val []string, p *[]string) *stringSliceValue {
 }
 
 func (s *stringSliceValue) Set(val string) error {
-	v := strings.Split(val, ",")
+	stringReader := strings.NewReader(val)
+	csvReader := csv.NewReader(stringReader)
+	v, err := csvReader.Read()
+	if err != nil {
+		return err
+	}
 	if !s.changed {
 		*s.value = v
 	} else {