ONOS-628 - Download and extract node binaries for the GUI build step
- Added gulp build task the:
	- Bundles Vendor JS files
	- Bundles ONOS JS Files
	- Bundles ONOS CSS Files
	- Added SourceMaps to JS bundles - Helps with debugging during development
- Added Bundles to index.js and removed old references
- Git Ignored any generated files
- Ensured the build step is able to build without a local copy of node installed
- Added BUCK genrules (provided by Viswa)
- Added BUCK Dependency to GUI
- Buck Rule to run when src changes
- Node/NPM downloaded using BUCK remote_file

Change-Id: Ia6ca3b952ff801850ade7469c23aac76c8520400
diff --git a/tools/gui/gulp-tasks/bundles/bundle-css/index.js b/tools/gui/gulp-tasks/bundles/bundle-css/index.js
new file mode 100644
index 0000000..0c5c8d6
--- /dev/null
+++ b/tools/gui/gulp-tasks/bundles/bundle-css/index.js
@@ -0,0 +1,20 @@
+import gulp from 'gulp';
+import concat from 'gulp-concat';
+import BundleResources from '../helpers/bundleResources';
+
+const GUI_BASE = '../../web/gui/src/main/webapp/';
+const bundleFiles = [
+    'app/onos.css',
+    'app/onos-theme.css',
+    'app/common.css',
+    'app/fw/**/*.css',
+    'app/view/**/*.css',
+];
+
+const task = gulp.task('bundle-css', function () {
+    return gulp.src(BundleResources(GUI_BASE, bundleFiles))
+        .pipe(concat('onos.css'))
+        .pipe(gulp.dest(GUI_BASE + '/dist/'));
+});
+
+export default task;
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