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 :)
This is for flash messages -- now when a user creates / updates / destroys a listing, flash messages appear at the top. This allows you to be able to close those flash messages (this is not great, but it works)