Remove Pipe

README.md

 * [Assetic](https://github.com/kriswallsmith/assetic) - An asset manager pipeline library.
 * [JShrink](https://github.com/tedious/JShrink) - A JavaScript minifier library.
 * [Munee](https://github.com/meenie/munee) - An asset optimiser library.
-* [Pipe](https://github.com/CHH/pipe) - Another asset manager pipeline library.
 * [Puli](https://github.com/puli/repository) - A library for determining assets absolute paths.
 * [BowerPHP](https://github.com/Bee-Lab/bowerphp) - A PHP implementation of Bower. A package manager for the web