Initial implementation of an elasticsearch indexer in Go

Closes #1 (closed)

indexer/commit.go

@@ -10,7 +10,7 @@ type Commit struct {
 	Type      string  `json:"type"`
 	ID        string  `json:"-"`
 	Author    *Person `json:"author"`
-	Committer *Person `json:"commiter"`
+	Committer *Person `json:"committer"`
 	RepoID    string  `json:"rid"`
 	Message   string  `json:"message"`
 	SHA       string  `json:"sha"`