CSS file is not attached I set at the .info module file the parameter to add a css file, 

stylesheets[all][] = css/style.css


but it is not attached even if I clear the cache. 

I have look for the web to get the reason but apparently is all I might have to do.

Anybody could tell me what am I missing please? Here the code: https://github.com/jmvelasco/drupal

The js files are attached.

Thanks in advance.
It could be as simple as just clearing cache or just visiting the 'modules' page in your admin. The content of .info files is cached and isn't reloaded with every page visit.