title: ansible-galaxy role fails with "do not have permission to modify /etc/ansible/roles/"
body: <p><code>tl;dr</code> = <strong>How do OS X users recommend working around this permissions error?</strong></p>
  
  <p>I'm on OS X 10.10.1 and I recently installed Ansible running the following: </p>
  
  <pre><code>sudo pip install ansible --quiet
  sudo pip install ansible --upgrade
  </code></pre>
  
  <p>I want to start off with a galaxy role to install homebrew and went to run this one with the following error: </p>
  
  <pre><code>$ ansible-galaxy install geerlingguy.homebrew
  - downloading role 'homebrew', owned by geerlingguy
  - downloading role from https://github.com/geerlingguy/ansible-role-homebrew/archive/1.0.1.tar.gz
  - extracting geerlingguy.homebrew to /etc/ansible/roles/geerlingguy.homebrew
  - error: you do not have permission to modify files in /etc/ansible/roles/geerlingguy.homebrew
  - geerlingguy.homebrew was NOT installed successfully.
  - you can use --ignore-errors to skip failed roles.
  </code></pre>
  
  <p>While I see <code>/etc</code> is owned by root, I don't see any notes in documentation saying I should <code>chmod</code> anything. </p>
  
  <p>For reference: </p>
  
  <pre><code>$ ansible --version
  ansible 1.8.2
    configured module search path = None
  </code></pre>
  
  <p>Is this expected or is my installation somehow wrong? </p>