Add basic gulp build system

gulpfile.js

@@ -0,0 +1,68 @@
+'use strict';
+
+var gulp = require('gulp');
+
+var sourcemaps = require('gulp-sourcemaps');
+
+var sass = require('gulp-sass');
+var concat = require('gulp-concat');
+
+var batch = require('gulp-batch');
+var watch = require('gulp-watch');
+
+var APPS = [
+    'RIGS'
+];
+
+var SASS_INCLUDE_PATHS = APPS.map(function (elem) {
+    return './' + elem + '/static/scss'
+}).concat(['./node_modules']);
+
+function css(opts) {
+    return gulp.src('PyRIGS/static/scss/screen.scss')
+        .pipe(sourcemaps.init())
+        .pipe(sass(
+            {includePaths: SASS_INCLUDE_PATHS}
+        )).on('error', sass.logError)
+        .pipe(sourcemaps.write('.'))
+        .pipe(gulp.dest('dist/css'));
+}
+
+gulp.task('css', function () {
+    return css()
+});
+
+gulp.task('watch', function () {
+    batch(function (events, done) {
+        gulp.start('css', done);
+    });
+    watch(SASS_INCLUDE_PATHS.concat(['PyRIGS/static/scss/screen.scss']), batch(function (events, done) {
+        gulp.start('css', done);
+    }));
+});
+
+// JS
+
+var JS_LIBS = [
+    './node_modules/jquery/dist/jquery.js',
+    './node_modules/tether/dist/js/tether.js',
+    './node_modules/bootstrap/dist/js/bootstrap.js'
+];
+
+function js_lib() {
+    return gulp.src(JS_LIBS)
+        .pipe(sourcemaps.init())
+        .pipe(concat('lib.js'))
+        .pipe(sourcemaps.write('.'))
+        .pipe(gulp.dest('dist/js'));
+}
+
+gulp.task('js_lib', function () {
+    return js_lib()
+});
+
+// Frontend tasks
+gulp.task('frontend', [
+    'css',
+    'js_lib'
+]);