Upgrade to Bazel 0.10.1 + sandbox revert

Change-Id: I359ab15f1fc94428acf2e1fd52fd1e0dd5428419
diff --git a/y2012/BUILD b/y2012/BUILD
index a0cdb4c..27ea143 100644
--- a/y2012/BUILD
+++ b/y2012/BUILD
@@ -1,4 +1,4 @@
-load('/aos/downloader/downloader', 'aos_downloader')
+load('//aos/downloader:downloader.bzl', 'aos_downloader')
 
 cc_binary(
   name = 'joystick_reader',