Sort listed files

Directories first, files seconds, otherwise alphabetically.  This is the
same order that GitHub uses.

quit.go

@@ -368,6 +368,12 @@ func (fc *FancyCommit) Description() string {
	return fc.commit.Message()
}
type byTypeAndName []*FancyFile
func (b byTypeAndName) Len() int           { return len(b) }
func (b byTypeAndName) Less(i, j int) bool { return b[i].Less(b[j]) }
func (b byTypeAndName) Swap(i, j int)      { b[i], b[j] = b[j], b[i] }
func (fc *FancyCommit) Files(recursive bool) ([]*FancyFile, error) {
	tree, err := fc.commit.Tree()
	if err != nil {
@@ -387,6 +393,8 @@ func (fc *FancyCommit) Files(recursive bool) ([]*FancyFile, error) {
		return nil, err
	}
	sort.Sort(byTypeAndName(files))
	return files, nil
}
@@ -546,6 +554,15 @@ func (fc *FancyFile) Contents() (template.HTML, error) {
	return template.HTML(buf.String()), nil
}
func (fc *FancyFile) Less(file *FancyFile) bool {
	if fc.entry.Type == file.entry.Type {
		return fc.entry.Name < file.entry.Name
	}
	return fc.entry.Type < file.entry.Type
}
var repoFuncs = template.FuncMap{
	"languageToColor": func(l string) string {
		c, ok := languageColors[l]