Show rspec progress in the terminal window

Rather than having Vim freeze while rspec works, I want to be able to watch the progress live.

I'm doing it by taking advantage of rspec's multi-formatters. I can spit the Vim specific format into an external file, while the standard format is still presented to standard out.

After the specs are done Vim reads the external file in.

Tested with rspec 2.11. I have no idea what earlier rspec will do with this.