Network rewrite/major cleanup, major caching changes, etc

Work on implementing capes
Update to no-express
Add more render tests
Add capes express route
Add documentation
Add undefined images to .gitignore
Fix no-express server again
Cleanup config a bit
General cleanup
Add CodeClimate badge
Test on Heroku
Speed optimizations
Fix tests
Code cleanup

public/stylesheets/style.css

@@ -195,6 +195,13 @@ h4 {
   background-image: url("/skins/0?default=alex");
 }
 
+#cape-example-1:hover .preview {
+  background-image: url("/capes/Dinnerbone");
+}
+#cape-example-2:hover .preview {
+  background-image: url("/capes/md_5");
+}
+
 img.preload {
   /*
     preload hover images
@@ -284,4 +291,4 @@ img.preload {
 .avatar.flipped {
   -webkit-transform: rotate(180deg);
   transform: rotate(180deg);
-}
+}