Initial implementation of an elasticsearch indexer in Go

Closes #1 (closed)

indexer/person.go

 package indexer
 import (
+	"time"
+
 	"srcd.works/go-git.v4/plumbing/object"
 )
+const (
+	elasticTimeFormat = "20060102150405-0700"
+)
+
 type Person struct {
 	Name  string `json:"name"`
 	Email string `json:"email"`
 	Time  string `json:"time"` // %Y%m%dT%H%M%S%z
 }
+func GenerateDate(t time.Time) string {
+	return t.Format(elasticTimeFormat)
+}
+
 func BuildPerson(p object.Signature) *Person {
 	return &Person{
 		Name:  p.Name,
 		Email: p.Email,
-		//Time: // FIXME: work this out
+		Time:  GenerateDate(p.When),
 	}
 }