feat: new Web UI build system

- use generator-gulp-angular by @swiip
- remove old static file

webui/gulp/styles.js

@@ -0,0 +1,54 @@
+'use strict';
+
+var path = require('path');
+var gulp = require('gulp');
+var conf = require('./conf');
+
+var browserSync = require('browser-sync');
+
+var $ = require('gulp-load-plugins')();
+
+var wiredep = require('wiredep').stream;
+var _ = require('lodash');
+
+gulp.task('styles-reload', ['styles'], function() {
+  return buildStyles()
+    .pipe(browserSync.stream());
+});
+
+gulp.task('styles', function() {
+  return buildStyles();
+});
+
+var buildStyles = function() {
+  var sassOptions = {
+    style: 'expanded'
+  };
+
+  var injectFiles = gulp.src([
+    path.join(conf.paths.src, '/app/**/*.scss'),
+    path.join('!' + conf.paths.src, '/app/index.scss')
+  ], { read: false });
+
+  var injectOptions = {
+    transform: function(filePath) {
+      filePath = filePath.replace(conf.paths.src + '/app/', '');
+      return '@import "' + filePath + '";';
+    },
+    starttag: '// injector',
+    endtag: '// endinjector',
+    addRootSlash: false
+  };
+
+
+  return gulp.src([
+    path.join(conf.paths.src, '/app/index.scss')
+  ])
+    .pipe($.inject(injectFiles, injectOptions))
+    .pipe(wiredep(_.extend({}, conf.wiredep)))
+    .pipe($.sourcemaps.init())
+    .pipe($.sass(sassOptions)).on('error', conf.errorHandler('Sass'))
+    .pipe($.autoprefixer()).on('error', conf.errorHandler('Autoprefixer'))
+    .pipe($.sourcemaps.write())
+    .pipe(gulp.dest(path.join(conf.paths.tmp, '/serve/app/')));
+};