Fix NPM scripts for Windows. Refactor NPM scripts

Author: igorshubovych

package.json

@@ -38,12 +38,12 @@
     "precommit": "npm run lint && npm run test:quiet",
     "prepush": "npm run test:quiet",
     "postinstall": "node ./bin/tldr --update",
-    "start": "NODE_ENV=development node ./bin/tldr",
-    "example": "NODE_ENV=development node ./bin/tldr tar",
+    "start": "node ./bin/tldr",
+    "example": "node ./bin/tldr tar",
     "test": "mocha test",
-    "test:quiet": "npm test -- --reporter=dot",
+    "test:quiet": "mocha test --reporter=dot",
     "lint": "eslint lib test bin/tldr",
-    "watch": "npm run test:quiet -- --reporter=min --watch --growl"
+    "watch": "mocha test --reporter=min --watch --growl"
   },
   "dependencies": {
     "async": "~1.5.0",