title: Ctags generate latest version gems
body: <p>I use <a href="http://github.com/tpope/vim-rails" rel="noreferrer">vim-rails</a> and <code>ctags</code> for navigate of methods. For it I run <code>ctags -R *</code> in <code>/home/***/.rvm/gems/ruby***/gems</code>. But in this directory was many folders for one gems just different versions(for example <code>activerecord</code> v. <code>3.0.7/3.1.3/3.2.2/3.2.3</code>). And when I try go to(<code>ctrl+]</code>) method I get to old version. How I can run ctags only with latest gems version?</p>