title: Questions about building a new gem using Wycats template
body: <p>I'm writing a new gem I'm basing off of <a href="http://github.com/wycats/newgem-template" rel="nofollow noreferrer">Yehuda's new gem template</a> and I'm slightly confused.  Having a Gemfile with dependencies, and also specifying a gemspec with dependencies seems redundant to me.  Can someone explain why this is desirable and if it's truly necessary?</p>
  
  <p>Note, this is the first gem I've ever written so I'm new to all of this.</p>