Fixing YAML formatting and adding Make target to lint files

Change-Id: I15104c2e39c4ae4e088a52758a26221b77f68dfb
diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000..23c6722
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,11 @@
+---
+
+yaml-files:
+  - '*.yaml'
+  - '*.yml'
+  - '.yamllint'
+
+rules:
+  document-start: disable
+  line-length:
+    max: 160