Add opening images in a modal window

app/assets/javascripts/components/actions/modal.jsx

@@ -0,0 +1,15 @@
+export const MEDIA_OPEN  = 'MEDIA_OPEN';
+export const MODAL_CLOSE = 'MODAL_CLOSE';
+
+export function openMedia(url) {
+  return {
+    type: MEDIA_OPEN,
+    url: url
+  };
+};
+
+export function closeModal() {
+  return {
+    type: MODAL_CLOSE
+  };
+};