Add maintainers file

Docker style: https://github.com/dotcloud/docker/blob/master/hack/MAINTAINERS.md

Signed-off-by: Ben Firshman <[email protected]>

MAINTAINERS

@@ -0,0 +1,4 @@
+Aanand Prasad <[email protected]> (@aanand)
+Ben Firshman <[email protected]> (@bfirsh)
+Chris Corbyn <[email protected]> (@d11wtq)
+Nathan LeClaire <[email protected]> (@nathanleclaire)