Updated package.json version and latest.json, preparation for 1.8.1 release

latest.json

@@ -1,4 +1,4 @@
 {
-	"version": "1.8.0",
-	"url": "http://grafanarel.s3.amazonaws.com/grafana-1.8.0.tar.gz"
+	"version": "1.8.1",
+	"url": "http://grafanarel.s3.amazonaws.com/grafana-1.8.1.tar.gz"
 }

package.json

@@ -4,7 +4,7 @@
     "company": "Coding Instinct AB"
   },
   "name": "grafana",
-  "version": "1.8.0",
+  "version": "1.8.1",
   "repository": {
     "type": "git",
     "url": "http://github.com/torkelo/grafana.git"