Add .circle.yml from atom/ci

Author: gsmcmullin

.circle.yml

@@ -0,0 +1,13 @@
+dependencies:
+  override:
+    - curl -s -O https://raw.githubusercontent.com/atom/ci/master/build-package.sh
+    - chmod u+x build-package.sh
+
+test:
+  override:
+    - ./build-package.sh
+
+machine:
+  environment:
+    ATOM_LINT_WITH_BUNDLED_NODE: "true"
+    APM_TEST_PACKAGES: ""