title: angular invalid version: 1.2.12 Error Bower
body: <p>When I try this command <code>bower install angular</code></p>
  
  <p>gives me this result:</p>
  
  <pre><code>bower install angular
  bower cloning git://github.com/angular/bower-angular.git
  bower cached git://github.com/angular/bower-angular.git
  bower fetching angular
  bower checking out angular#v1.2.12-build.2216+sha.5850e61
  bower error invalid version: 1.2.12-build.2216+sha.5850e61
  
  There were errors, here's a summary of them:
  - angular invalid version: 1.2.12-build.2216+sha.5850e61 
  </code></pre>
  
  <p>Any help is very appreciated</p>