Add release notes

Signed-off-by: Keenan Hoffman <khofh@allstate.com>

ci/release_notes.md

@@ -0,0 +1,13 @@
+# Improvements
+- `ha_proxy.http_request_deny_conditions`  now supports negations of ACLs thanks to @gdenn
+   Simply add the `negate: true` field to your ACL to negate it.
+- `ha_proxy.cidrs_in_file` has been added to allow users to specify a wide array of ACLs
+  that apply to an ACL in the `ha_proxy.http_request_deny_conditions` ACL list, which
+  would otherwise be too long for haproxy to start up properly. Take a look at [the example]
+  for more details(https://github.com/cloudfoundry-incubator/haproxy-boshrelease/blob/master/jobs/haproxy/spec#L396-L406).
+  Thanks @gdenn for this feature as well!
+
+# Bug Fixes
+
+- Resolved an issue where the haproxy stop script would fail if haproxy was already stopped.
+  Thanks for the fix @domdom82!