Add yet-another-react-lightbox package and update .gitignore to exclude node_modules

frontend/node_modules/json-stable-stringify-without-jsonify/test/cmp.js

@@ -1,11 +0,0 @@
-var test = require('tape');
-var stringify = require('../');
-
-test('custom comparison function', function (t) {
-    t.plan(1);
-    var obj = { c: 8, b: [{z:6,y:5,x:4},7], a: 3 };
-    var s = stringify(obj, function (a, b) {
-        return a.key < b.key ? 1 : -1;
-    });
-    t.equal(s, '{"c":8,"b":[{"z":6,"y":5,"x":4},7],"a":3}');
-});