feat: new Web UI build system

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

webui/gulpfile.js

@@ -0,0 +1,29 @@
+/**
+ *  Welcome to your gulpfile!
+ *  The gulp tasks are splitted in several files in the gulp directory
+ *  because putting all here was really too long
+ */
+
+'use strict';
+
+var gulp = require('gulp');
+var wrench = require('wrench');
+
+/**
+ *  This will load all js or coffee files in the gulp directory
+ *  in order to load all gulp tasks
+ */
+wrench.readdirSyncRecursive('./gulp').filter(function(file) {
+  return (/\.(js|coffee)$/i).test(file);
+}).map(function(file) {
+  require('./gulp/' + file);
+});
+
+
+/**
+ *  Default task clean temporaries directories and launch the
+ *  main optimization build task
+ */
+gulp.task('default', ['clean'], function () {
+  gulp.start('build');
+});