From http://getskeleton.com:
Skeleton is a small collection of well-organized CSS that can help you rapidly develop sites that look beautiful at any size, be it a 17" laptop screen or an iPhone.
This module provides the assets for Skeleton in a format that can be readily dropped into a Zend Framework 2 application as a module.
Simply drop this into your "module/" directory. To expose the CSS and images under your document root, you have several options:
Probably the easiest way is to simply copy them:
cp -a module/SkeletonModuleCss/public/css public/css/SkeletonCssModule
cp -a module/SkeletonModuleCss/public/images public/images/SkeletonCssModule
If you are on a *nix-based system, you can symlink.
cd public/css/
ln -s ../../../module/SkeletonCssModule/public/css SkeletonCssModule
cd ../images
ln -s ../../../module/SkeletonCssModule/public/images SkeletonCssModule
This is also possible on Windows Server 2003 and above; however, you will have to look up the methodology yourself at this time.
On Apache, you can use mod_alias to accomplish this. The most direct way is to specify aliases for each module:
Alias /css/SkeletonCssModule/ /path/to/site/module/SkeletonCssModule/public/css/
Alias /images/SkeletonCssModule/ /path/to/site/module/SkeletonCssModule/public/images/
Alternately, you could use AliasMatch to condense this and serve many modules, assuming they follow the same directory layout:
AliasMatch /(css|images)/([^/]+)/(.*) /path/to/site/module/$2/public/$1/$3
I personally like this approach as it makes it trivial for me to keep my assets module-specific, and thus managed as separate submodule projects.
Similar functionality exists on other web servers; check your server's documentation for ideas on how you might accomplish this.
You typically should not directly alter the files under a module. As such, the last two examples above (symlinking and aliasing) are very good techniques. However, if you must alter the files, I recommend method 1 above (copying), and then altering the copies. This allows you to version those files, while retaining the module's integrity.