Migrate traefik to engine-api

The docker provider now uses docker/engine-api and
vdemeester/docker-events instead of fsouza-dockerclient.

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

glide.yaml

@@ -52,8 +52,6 @@ import:
     ref:     26b4e3aac686940fe29521545afad9966ddfc80c
   - package: github.com/flynn/go-shlex
     ref:     3f9db97f856818214da2e1057f8ad84803971cff
-  - package: github.com/fsouza/go-dockerclient
-    ref:     a49c8269a6899cae30da1f8a4b82e0ce945f9967
   - package: github.com/boltdb/bolt
     ref:     51f99c862475898df9773747d3accd05a7ca33c1
   - package: gopkg.in/mgo.v2
@@ -168,8 +166,11 @@ import:
     - types/container
     - types/filters
     - types/strslice
+  - package: github.com/vdemeester/docker-events
   - package: github.com/docker/go-connections
     subpackages:
     - nat
+    - sockets
+    - tlsconfig
   - package: github.com/docker/go-units
   - package: github.com/mailgun/multibuf