Fix a couple broken links

Signed-off-by: Jay Kamat <github@jgkamat.33mail.com>
(cherry picked from commit 4ca0aad85557ae41c8f4eeb978287cd8657a50b6)

README.md

@@ -13,7 +13,7 @@ databases, and backend services without depending on a particular stack
 or provider.
 
 Docker began as an open-source implementation of the deployment engine which
-powers [dotCloud](https://dotcloud.com), a popular Platform-as-a-Service.
+powers [dotCloud](https://www.dotcloud.com), a popular Platform-as-a-Service.
 It benefits directly from the experience accumulated over several years
 of large-scale operation and support of hundreds of thousands of
 applications and databases.

experimental/README.md

@@ -61,8 +61,6 @@ After downloading the appropriate binary, you can follow the instructions
 
 ## Current experimental features
 
-* [Support for Docker plugins](plugins.md)
-* [Volume plugins](plugins_volume.md)
 * [Network plugins](plugins_network.md)
 * [Native Multi-host networking](networking.md)
 * [Compose, Swarm and networking integration](compose_swarm_networking.md)