diff --git a/go/vendor/github.com/go-openapi/strfmt/duration.go b/go/vendor/github.com/go-openapi/strfmt/duration.go
new file mode 100644
index 0000000..28df8e4
--- /dev/null
+++ b/go/vendor/github.com/go-openapi/strfmt/duration.go
@@ -0,0 +1,203 @@
+// Copyright 2015 go-swagger maintainers
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package strfmt
+
+import (
+	"database/sql/driver"
+	"errors"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/globalsign/mgo/bson"
+	"github.com/mailru/easyjson/jlexer"
+	"github.com/mailru/easyjson/jwriter"
+)
+
+func init() {
+	d := Duration(0)
+	// register this format in the default registry
+	Default.Add("duration", &d, IsDuration)
+}
+
+var (
+	timeUnits = [][]string{
+		{"ns", "nano"},
+		{"us", "µs", "micro"},
+		{"ms", "milli"},
+		{"s", "sec"},
+		{"m", "min"},
+		{"h", "hr", "hour"},
+		{"d", "day"},
+		{"w", "wk", "week"},
+	}
+
+	timeMultiplier = map[string]time.Duration{
+		"ns": time.Nanosecond,
+		"us": time.Microsecond,
+		"ms": time.Millisecond,
+		"s":  time.Second,
+		"m":  time.Minute,
+		"h":  time.Hour,
+		"d":  24 * time.Hour,
+		"w":  7 * 24 * time.Hour,
+	}
+
+	durationMatcher = regexp.MustCompile(`((\d+)\s*([A-Za-zµ]+))`)
+)
+
+// IsDuration returns true if the provided string is a valid duration
+func IsDuration(str string) bool {
+	_, err := ParseDuration(str)
+	return err == nil
+}
+
+// Duration represents a duration
+//
+// Duration stores a period of time as a nanosecond count, with the largest
+// repesentable duration being approximately 290 years.
+//
+// swagger:strfmt duration
+type Duration time.Duration
+
+// MarshalText turns this instance into text
+func (d Duration) MarshalText() ([]byte, error) {
+	return []byte(time.Duration(d).String()), nil
+}
+
+// UnmarshalText hydrates this instance from text
+func (d *Duration) UnmarshalText(data []byte) error { // validation is performed later on
+	dd, err := ParseDuration(string(data))
+	if err != nil {
+		return err
+	}
+	*d = Duration(dd)
+	return nil
+}
+
+// ParseDuration parses a duration from a string, compatible with scala duration syntax
+func ParseDuration(cand string) (time.Duration, error) {
+	if dur, err := time.ParseDuration(cand); err == nil {
+		return dur, nil
+	}
+
+	var dur time.Duration
+	ok := false
+	for _, match := range durationMatcher.FindAllStringSubmatch(cand, -1) {
+
+		factor, err := strconv.Atoi(match[2]) // converts string to int
+		if err != nil {
+			return 0, err
+		}
+		unit := strings.ToLower(strings.TrimSpace(match[3]))
+
+		for _, variants := range timeUnits {
+			last := len(variants) - 1
+			multiplier := timeMultiplier[variants[0]]
+
+			for i, variant := range variants {
+				if (last == i && strings.HasPrefix(unit, variant)) || strings.EqualFold(variant, unit) {
+					ok = true
+					dur += (time.Duration(factor) * multiplier)
+				}
+			}
+		}
+	}
+
+	if ok {
+		return dur, nil
+	}
+	return 0, fmt.Errorf("Unable to parse %s as duration", cand)
+}
+
+// Scan reads a Duration value from database driver type.
+func (d *Duration) Scan(raw interface{}) error {
+	switch v := raw.(type) {
+	// TODO: case []byte: // ?
+	case int64:
+		*d = Duration(v)
+	case float64:
+		*d = Duration(int64(v))
+	case nil:
+		*d = Duration(0)
+	default:
+		return fmt.Errorf("cannot sql.Scan() strfmt.Duration from: %#v", v)
+	}
+
+	return nil
+}
+
+// Value converts Duration to a primitive value ready to be written to a database.
+func (d Duration) Value() (driver.Value, error) {
+	return driver.Value(int64(d)), nil
+}
+
+// String converts this duration to a string
+func (d Duration) String() string {
+	return time.Duration(d).String()
+}
+
+// MarshalJSON returns the Duration as JSON
+func (d Duration) MarshalJSON() ([]byte, error) {
+	var w jwriter.Writer
+	d.MarshalEasyJSON(&w)
+	return w.BuildBytes()
+}
+
+// MarshalEasyJSON writes the Duration to a easyjson.Writer
+func (d Duration) MarshalEasyJSON(w *jwriter.Writer) {
+	w.String(time.Duration(d).String())
+}
+
+// UnmarshalJSON sets the Duration from JSON
+func (d *Duration) UnmarshalJSON(data []byte) error {
+	l := jlexer.Lexer{Data: data}
+	d.UnmarshalEasyJSON(&l)
+	return l.Error()
+}
+
+// UnmarshalEasyJSON sets the Duration from a easyjson.Lexer
+func (d *Duration) UnmarshalEasyJSON(in *jlexer.Lexer) {
+	if data := in.String(); in.Ok() {
+		tt, err := ParseDuration(data)
+		if err != nil {
+			in.AddError(err)
+			return
+		}
+		*d = Duration(tt)
+	}
+}
+
+// GetBSON returns the Duration a bson.M{} map.
+func (d *Duration) GetBSON() (interface{}, error) {
+	return bson.M{"data": int64(*d)}, nil
+}
+
+// SetBSON sets the Duration from raw bson data
+func (d *Duration) SetBSON(raw bson.Raw) error {
+	var m bson.M
+	if err := raw.Unmarshal(&m); err != nil {
+		return err
+	}
+
+	if data, ok := m["data"].(int64); ok {
+		*d = Duration(data)
+		return nil
+	}
+
+	return errors.New("couldn't unmarshal bson raw value as Duration")
+}