Adding changelog for vendoring libnetwork into docker

Signed-off-by: Madhu Venugopal <madhu@docker.com>

libnetwork/CHANGELOG.md

@@ -0,0 +1,44 @@
+# Changelog
+
+## 0.5.3 (2016-01-12)
+- Bridge driver supporting internal network option
+- Backend implementation to support "force" option to network disconnect
+- Fixing a regex in etchosts package to fix docker/docker#19080
+
+## 0.5.2 (2016-01-08)
+- Embedded DNS replacing /etc/hosts based Service Discovery
+- Container local alias and Network-scoped alias support
+- Backend support for internal network mode
+- Support for IPAM driver options
+- Fixes overlay veth cleanup issue : docker/docker#18814
+- fixes docker/docker#19139
+- disable IPv6 Duplicate Address Detection
+
+## 0.5.1 (2015-12-07)
+- Allowing user to assign IP Address for containers
+- Fixes docker/docker#18214
+- Fixes docker/docker#18380
+
+## 0.5.0 (2015-10-30)
+
+- Docker multi-host networking exiting experimental channel
+- Introduced IP Address Management and IPAM drivers
+- DEPRECATE service discovery from default bridge network
+- Introduced new network UX
+- Support for multiple networks in bridge driver
+- Local persistance with boltdb
+
+## 0.4.0 (2015-07-24)
+
+- Introduce experimental version of Overlay driver
+- Introduce experimental version of network plugins
+- Introduce experimental version of network & service UX
+- Introduced experimental /etc/hosts based service discovery
+- Integrated with libkv
+- Improving test coverage
+- Fixed a bunch of issues with osl namespace mgmt
+
+## 0.3.0 (2015-05-27)
+ 
+- Introduce CNM (Container Networking Model)
+- Replace docker networking with CNM & Bridge driver