Merge branch 'stable-2.16' into stable-3.0

* stable-2.16:
  Bump bazel version to 1.0.0
  Upgrade bazlets to latest stable-2.16 to build with 2.16.12 API
  Upgrade bazlets to latest stable-2.15 to build with 2.15.17 API

Change-Id: I9f9bdc9bf437f987aa791bb9994045008208d700
diff --git a/WORKSPACE b/WORKSPACE
index 6aeac55..4aa4286 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -3,7 +3,7 @@
 load("//:bazlets.bzl", "load_bazlets")
 
 load_bazlets(
-    commit = "ec989bb514e39447764057c60d3f9959bff8e153",
+    commit = "0ca51936ca46049cddd34e971a595d3baafe731b",
     #local_path = "/home/<user>/projects/bazlets",
 )