Liquid Template Tags

How do I properly use liquid in my blog posts?

So far I found out, that I have to add the liquid gem to my Gemfile. I created a folder lib/tags and copied all files from https://github.com/imathis/octopress/tree/master/plugins to it.

Then I tried to make these tags available by putting
Dir[File.dirname(__FILE__) + '/lib/tags/*.rb'].each {|file| require file } to my config.rb.

Is this really the way meant to be? Looks a bit weard to me.

Unfortunately I haven’t found any hints in the documentation and not a simple example in the web.