Clean the linting script

This also has the side effect of correcting the `npm test` Unix exit
status number -- which was previously always 0.

We also edit the website URL.

package.json

@@ -5,7 +5,7 @@
   "private": true,
   "scripts": {
     "lint": "eslint .",
-    "test": "npm run lint"
+    "test": "npm run --silent lint"
   },
   "repository": {
     "type": "git",
@@ -15,7 +15,7 @@
   "bugs": {
     "url": "https://github.com/wekan/wekan/issues"
   },
-  "homepage": "https://github.com/wekan/wekan#readme",
+  "homepage": "http://wekan.io",
   "devDependencies": {
     "babel-eslint": "4.1.3",
     "eslint": "1.7.3",