Few fixes/tweaks for the Cache app, but still a bit to go

Hey man,

Here are a few things I did to tweak the application. There's actually a few more things to do to make it more secure, but I figured I had already changed a lot of things already :)
I added a couple of css files to the app -- pure-alert and custom.

* pure-alert are styles for the alert messages at the top
* custom are just custom styles I'll probably go back to and fix to be better integrated into the app.