Convert actions to event loops

The logic gets significantly simpler due to Watchers.  But we also get
to port all the users over as well.

Change-Id: Ib4e75951e65f7431acc6c1548b7f1d20da3da295
diff --git a/y2016/dashboard/BUILD b/y2016/dashboard/BUILD
index 2892814..f3998a1 100644
--- a/y2016/dashboard/BUILD
+++ b/y2016/dashboard/BUILD
@@ -28,6 +28,8 @@
     deps = [
         ":gen_embedded",
         "//aos:init",
+        "//aos/events:event-loop",
+        "//aos/events:shm-event-loop",
         "//aos/logging",
         "//aos/seasocks:seasocks_logger",
         "//aos/time",