Removes the reference to yui-compressor in the README. Using pagespee…

…d, I can automatically minimize and concat css files.

README.md

@@ -19,7 +19,6 @@ It's made with:
  * Create a user and a database for isitdown.site, and import the isitdown.db file.
  * Give build.sh run permissions: `chmod +x build.sh`
  * Open a terminal, and run `./build.sh` to create the virtual environment and download the required packages.
-    * It also need yui-compressor used to minify the css.
  * Type `source .venv/bin/activate` to activate the virtual environment
  * Add the database connection uri as enviornment variable: `export DATABASE_URI=postgresql://username:password@localhost/database`. You can add a `PORT` variable to ovverride the default listening port (5000).
  * Finally, run `python3 index.py` to run the site.