title: rake release fail (using gem bundler)
body: <p>I published my first rubygem here: <a href="https://rubygems.org/gems/blomming_api">https://rubygems.org/gems/blomming_api</a>
  (source code here: <a href="https://github.com/solyaris/blomming_api">https://github.com/solyaris/blomming_api</a>)</p>
  
  <p>I used bundler, that create three rake tasks with <code>bundle gem</code> command:</p>
  
  <pre><code>$ rake -T
  rake build    # Build blomming_api-0.3.7.gem into the pkg directory
  rake install  # Build and install blomming_api-0.3.7.gem into system gems
  rake release  # Create tag v0.3.7 and build and push blomming_api-0.3.7.gem to Rubygems
  </code></pre>
  
  <p>All fine if install locally the gem with <code>rake install</code>:</p>
  
  <pre><code>$ rake install
  blomming_api 0.3.7 built to pkg/blomming_api-0.3.7.gem.
  blomming_api (0.3.7) installed.
  </code></pre>
  
  <p>The problem arise when I try to release:</p>
  
  <pre><code>$ rake release
  blomming_api 0.3.7 built to pkg/blomming_api-0.3.7.gem.
  Tagged v0.3.7.
  Untagging v0.3.7 due to error.
  rake aborted!
  Couldn't git push. `git push  2&gt;&amp;1' failed with the following output:
  
  fatal: No configured push destination.
  Either specify the URL from the command-line or configure a remote repository using
  
      git remote add &lt;name&gt; &lt;url&gt;
  
  and then push using the remote name
  
      git push &lt;name&gt;
  
  
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:104:in `perform_git_push'
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:96:in `git_push'
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:77:in `block in release_gem'
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:129:in `tag_version'
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:77:in `release_gem'
  /home/solyaris/.rvm/gems/ruby-2.0.0-p247/gems/bundler-1.3.5/lib/bundler/gem_helper.rb:50:in `block in install'
  Tasks: TOP =&gt; release
  (See full trace by running task with --trace)
  </code></pre>
  
  <p>Nevertheless I'm able to publish the gem with successfull <code>gem push</code> command:</p>
  
  <pre><code>$ gem push pkg/blomming_api-0.3.7.gem
  Pushing gem to https://rubygems.org...
  Successfully registered gem: blomming_api (0.3.7)
  </code></pre>
  
  <p>I presume that problem is on the git push remote configuration...
  Any idea to help me configure git to let rake release run ?</p>
  
  <p>BTW, I already configured my rubygems credentials on /home/solyaris/.gem
  and git push on github run ok.
  I know... my git reluctance is big ;-)
  Thanks
  giorgio</p>