ARI: Bump non-breaking version number to 5.1.1

The channel create call now allows setting variables.

Change-Id: I5e5bd34e0eb3df6e7feb2095e00a91c742ad5113

rest-api/resources.json

@@ -2,7 +2,7 @@
 	"_copyright": "Copyright (C) 2012 - 2013, Digium, Inc.",
 	"_author": "David M. Lee, II <dlee@digium.com>",
 	"_svn_revision": "$Revision$",
-	"apiVersion": "5.1.0",
+	"apiVersion": "5.1.1",
 	"swaggerVersion": "1.1",
 	"basePath": "http://localhost:8088/ari",
 	"apis": [