Initial implementation of an elasticsearch indexer in Go

Closes #1 (closed)

indexer/blob.go

@@ -58,9 +58,7 @@ func GenerateBlobID(parentID, filename string) string {
 	return fmt.Sprintf("%s_%s", parentID, filename)
 }
-func (i *Indexer) BuildBlob(file *git.File, commitSHA string) (*Blob, error) {
-	parentID := i.Submitter.ParentID()
-
+func BuildBlob(file *git.File, parentID, commitSHA string) (*Blob, error) {
 	if file.Size > maxBlobSize {
 		return nil, skipTooLargeBlob
 	}