Some additions to aos/vision/blob (transpose and move_scale).

Change-Id: I927144e27d0494f3ea879ebbd1647741f82e3c7b
diff --git a/aos/vision/blob/find_blob.cc b/aos/vision/blob/find_blob.cc
index 0e2586b..3153fcb 100644
--- a/aos/vision/blob/find_blob.cc
+++ b/aos/vision/blob/find_blob.cc
@@ -52,7 +52,7 @@
 };
 
 // Uses disjoint set class to track range images.
-// Joins in the disjoint set are done at the same time as joins in the 
+// Joins in the disjoint set are done at the same time as joins in the
 // range image.
 class BlobDisjointSet {
  public: