Move to CircleCI 2.0

closes #727

.circleci/run-build-locally.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+curl --user ${CIRCLE_TOKEN}: \
+    --request POST \
+    --form revision=<ENTER COMMIT SHA HERE>\
+    --form config=@config.yml \
+    --form notify=false \
+        https://circleci.com/api/v1.1/project/github/outline/outline/tree/master