Analytics (#582)

* gtm > ga

* Record pageviews in SPA

* Remove home-rolled tracking in favor of autotrack

* cleanup

package.json

@@ -64,6 +64,7 @@
     "@tommoor/slate-drop-or-paste-images": "^0.8.1",
     "@tommoor/slate-edit-code": "^0.13.3",
     "aws-sdk": "^2.135.0",
+    "autotrack": "^2.4.1",
     "babel-core": "^6.24.1",
     "babel-eslint": "^8.1.2",
     "babel-loader": "^7.1.2",
@@ -145,7 +146,7 @@
     "query-string": "^4.3.4",
     "randomstring": "1.1.5",
     "raw-loader": "^0.5.1",
-    "react": "^16.1.0",
+    "react": "^16.2.0",
     "react-avatar-editor": "^10.3.0",
     "react-dom": "^16.1.0",
     "react-dropzone": "4.2.1",