Add a note about pygments in the README

Signed-off-by: Alberto Bertogli <[email protected]>

Author: albertito

README

@@ -22,6 +22,9 @@ Getting started
 You will need Python, and the bottle.py framework (the package is usually
 called python-bottle in most distributions).
 
+If pygments is available, it will be used for syntax highlighting, otherwise
+everything will work fine, just in black and white.
+
 
 First, create a configuration file for your repositories. You can start by
 copying sample.conf, which has the list of the available options.