Refactor for more flexibility

* Move from gcfg to toml configuration because gcfg was too restrictive
* Implemented gateway which has support multiple in and out bridges.
* Allow for bridging the same bridges, which means eg you can now bridge between multiple mattermosts.
* Support multiple gateways

vendor/manifest

@@ -19,6 +19,14 @@
 			"path": "/matterclient",
 			"notests": true
 		},
+		{
+			"importpath": "github.com/BurntSushi/toml",
+			"repository": "https://github.com/BurntSushi/toml",
+			"vcs": "git",
+			"revision": "99064174e013895bbd9b025c31100bd1d9b590ca",
+			"branch": "master",
+			"notests": true
+		},
 		{
 			"importpath": "github.com/Sirupsen/logrus",
 			"repository": "https://github.com/Sirupsen/logrus",
@@ -203,14 +211,6 @@
 			"path": "/websocket",
 			"notests": true
 		},
-		{
-			"importpath": "gopkg.in/gcfg.v1",
-			"repository": "https://gopkg.in/gcfg.v1",
-			"vcs": "",
-			"revision": "083575c3955c85df16fe9590cceab64d03f5eb6e",
-			"branch": "master",
-			"notests": true
-		},
 		{
 			"importpath": "gopkg.in/yaml.v2",
 			"repository": "https://gopkg.in/yaml.v2",