Update React to version 15 (#302)

* update gitignore

* update react to version 15

Author: durunvo

package.json

@@ -53,12 +53,12 @@
     "node-sass": "~3.4.2",
     "parse": "1.6.14",
     "prismjs": "~1.2.0",
-    "react": "^0.14.0",
-    "react-addons-test-utils": "^0.14.2",
-    "react-dnd": "~2.0.2",
+    "react": "^15.0.1",
+    "react-addons-test-utils": "^15.0.1",
+    "react-dnd": "~2.1.4",
     "react-dnd-html5-backend": "~2.0.0",
-    "react-dom": "^0.14.0",
-    "react-router": "2.0.0",
+    "react-dom": "^15.0.1",
+    "react-router": "2.3.0",
     "sass-loader": "~3.1.2",
     "style-loader": "~0.12.3",
     "svg-prep": "~1.0.0",