title: How to use gems locally?
body: <p>I would like to use gems <code>'better_errors'</code> and <code>'binding_of_caller'</code> for my debugging in rails app, but i DON'T want to include those in <code>Gemfile</code>. Is it possible to do? My first thought was to simply</p>
  
  <pre><code>gem install better_errors
  gem install binding_of_caller
  </code></pre>
  
  <p>but it doesnt work, i mean installation finishes without problems, but thats it, gem doesnt seem to work at all when i run my app on localhost. Do I need some kind of config set, anybody?</p>