Checking in debug_view, some extra missing utils, and the y2016 target_sender code.

Change-Id: I241947265da8f332c39862f4d0ddcdc2d29c7b68
diff --git a/aos/vision/debug/BUILD b/aos/vision/debug/BUILD
new file mode 100644
index 0000000..91111b2
--- /dev/null
+++ b/aos/vision/debug/BUILD
@@ -0,0 +1,22 @@
+#!/usr/bin/python3
+package(default_visibility = ["//visibility:public"])
+
+cc_library(
+    name = "overlay",
+    hdrs = ["overlay.h"],
+    deps = [
+        '//aos/vision/math:vector',
+        '//aos/vision/math:segment',
+        '//aos/vision/image:image_types',
+        ],
+)
+
+cc_library(name = "debug_viewer",
+    srcs = ["debug_viewer.cc"],
+    hdrs = ["debug_viewer.h"],
+    deps = [
+        '@usr_repo//:gtk+-3.0',
+        "//aos/vision/image:image_types",
+        ":overlay",
+    ]
+)