title: gitosis and git clone problem
body: <p>I have installed gitosis, but i have strange thing when i'm working with repos.
  In config i have </p>
  
  <pre><code>[gitosis]
  
  [group gitosis-admin]
  writable = gitosis-admin
  members = me@server me@laptop
  
  [group prj1]
  writable = prj1
  members = me@laptop
  </code></pre>
  
  <p>and in /home/git/repositories i have created directory prj1.git with empty git repo.</p>
  
  <p>i can work with gitosis-admin from server and laptop without problems, but when i'm trying to <em>git clone</em> prj1 on my laptop i see </p>
  
  <pre><code>$ git clone git@server:prj1.git
  Initialized empty Git repository in /Users/alec/temp/prj1/.git/
  fatal: no matching remote head
  </code></pre>
  
  <p>ok, lets push prj1 from laptop to server:</p>
  
  <pre><code>$ git push origin master:refs/heads/master
  ERROR:gitosis.serve.main:Repository read access denied
  fatal: The remote end hung up unexpectedly
  </code></pre>
  
  <p>Whats wrong?</p>