Move tasks to separate files and simplify

gulp/tasks/clean.js

@@ -0,0 +1,9 @@
+const config = require('../config');
+const del = require('del');
+
+// Clean output folders
+function clean() {
+  return del([config.dev + '**', config.rep + '**', config.dpl + '**']);
+}
+
+module.exports = clean;

gulp/tasks/hello.js

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+function hello (cb) {
+  console.log('He Stephan', cb);
+  cb();
+}
+
+module.exports = hello;

gulp/tasks/sync.js

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+const config = require('../config');
+const browserSync = require('browser-sync'), server = browserSync.create();
+
+// Automagically reload browsers
+function reload(done) {
+  server.reload();
+
+  done();
+}
+
+// Serve files to the browser
+function serve(done) {
+  server.init({
+    index: config.index,
+    open: false,
+    server: config.dev
+  });
+
+  done();
+}
+
+module.exports = {
+  serve: serve,
+  reload: reload,
+};

gulp/tasks/validate.js

@@ -0,0 +1,13 @@
+const { src } = require('gulp');
+const config = require('../config');
+const plumber = require('../modules/plumber');
+const htmlValidator = require('gulp-w3c-html-validator');
+
+function validate() {
+  return src(config.dev + '**/*.html')
+    .pipe(plumber())
+    .pipe(htmlValidator())
+    .pipe(htmlValidator.reporter());
+}
+
+module.exports = validate;