title: Proguard returned error
body: <p>I get this error when doing export signed application package</p>
  
  <pre><code>[2015-02-09 17:22:33 - matriX] Proguard returned with error code 1. See console
  [2015-02-09 17:22:33 - matriX] proguard.ParseException: Expecting opening '{' at '­keepclassmembernames' in line 56 of file 'C:\Users\dani__000\Dropbox\matriXFerran\proguard-project.txt',
  [2015-02-09 17:22:33 - matriX]   included from argument number 4
  [2015-02-09 17:22:33 - matriX]  at proguard.ConfigurationParser.parseClassSpecificationArguments(ConfigurationParser.java:678)
  [2015-02-09 17:22:33 - matriX]  at proguard.ConfigurationParser.parseKeepClassSpecificationArguments(ConfigurationParser.java:490)
  [2015-02-09 17:22:33 - matriX]  at proguard.ConfigurationParser.parse(ConfigurationParser.java:141)
  [2015-02-09 17:22:33 - matriX]  at proguard.ProGuard.main(ProGuard.java:484)
  </code></pre>
  
  <p>and the line is this one:</p>
  
  <pre><code>-­keepclassmembernames class * {
    @com.google.android.gms.common.annotation.KeepName *; 
  }
  </code></pre>