Upgrade to Go1.6, use vendor

Also make sure we're using a more recent version of godep

vendor/github.com/gin-gonic/gin/utils.go

@@ -0,0 +1,82 @@
+// Copyright 2014 Manu Martinez-Almeida.  All rights reserved.
+// Use of this source code is governed by a MIT style
+// license that can be found in the LICENSE file.
+
+package gin
+
+import (
+	"encoding/xml"
+	"reflect"
+	"runtime"
+	"strings"
+)
+
+type H map[string]interface{}
+
+// Allows type H to be used with xml.Marshal
+func (h H) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
+	start.Name = xml.Name{
+		Space: "",
+		Local: "map",
+	}
+	if err := e.EncodeToken(start); err != nil {
+		return err
+	}
+	for key, value := range h {
+		elem := xml.StartElement{
+			Name: xml.Name{Space: "", Local: key},
+			Attr: []xml.Attr{},
+		}
+		if err := e.EncodeElement(value, elem); err != nil {
+			return err
+		}
+	}
+	if err := e.EncodeToken(xml.EndElement{Name: start.Name}); err != nil {
+		return err
+	}
+	return nil
+}
+
+func filterFlags(content string) string {
+	for i, char := range content {
+		if char == ' ' || char == ';' {
+			return content[:i]
+		}
+	}
+	return content
+}
+
+func chooseData(custom, wildcard interface{}) interface{} {
+	if custom == nil {
+		if wildcard == nil {
+			panic("negotiation config is invalid")
+		}
+		return wildcard
+	}
+	return custom
+}
+
+func parseAccept(accept string) []string {
+	parts := strings.Split(accept, ",")
+	for i, part := range parts {
+		index := strings.IndexByte(part, ';')
+		if index >= 0 {
+			part = part[0:index]
+		}
+		part = strings.TrimSpace(part)
+		parts[i] = part
+	}
+	return parts
+}
+
+func lastChar(str string) uint8 {
+	size := len(str)
+	if size == 0 {
+		panic("The length of the string can't be 0")
+	}
+	return str[size-1]
+}
+
+func nameOfFunction(f interface{}) string {
+	return runtime.FuncForPC(reflect.ValueOf(f).Pointer()).Name()
+}