add eslint, add check if php-cgi exists, rename tests folder into test

Author: philippsimon

.eslintrc.json

@@ -0,0 +1,27 @@
+{
+  "env": {
+    "node": true
+  },
+  "extends": "eslint:recommended",
+  "ignore": [
+    "node_modules"
+  ],
+  "rules": {
+    "indent": [
+      "error",
+      2
+    ],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ]
+  }
+}