Introduce a CODEOWNERS file for auto-assign of review by GitHub

Right now keep it simple for testing, we can decide how we want to go
forward with this vs MAINTAINERs file, etc.

Signed-off-by: Kumar Gala <kumar.gala@linaro.org>

CODEOWNERS

diff --git a/CODEOWNERS b/CODEOWNERS
new file mode 100644
index 0000000..e549935
--- /dev/null
+++ b/CODEOWNERS
@@ -0,0 +1,5 @@
+# CODEOWNERS for autoreview assigning in github
+
+# Get all docs reviewed
+doc/	@dbkinder
+*.rst	@dbkinder