Add .nojekyll file for gh-pages

lib/generate.js

@@ -103,6 +103,12 @@ module.exports = function () {
     return Promise.all(promises)
   })
   .then((pages) => {
+    // Add .nojekyll file to let Github Pages add the _nuxt/ folder
+    // https://help.github.com/articles/files-that-start-with-an-underscore-are-missing/
+    const nojekyllPath = resolve(distPath, '.nojekyll')
+    return writeFile(nojekyllPath)
+  })
+  .then(() => {
     debug('HTML Files generated')
   })
 }