title: Shenzen ios build giving error
body: <p>I'm getting the following error when running the Shenzen (<a href="https://github.com/nomad/shenzhen" rel="noreferrer">https://github.com/nomad/shenzhen</a>) utility.  I am using Xcode 6 beta 4 trying to build an ios app. Any thoughts?</p>
  
  <pre><code>ipa build 
  
  Select a scheme:
  1. FieldApp-LOCAL
  2. FieldApp-RELEASE
  ?  2
       xcodebuild  FieldApp.xcworkspace
  2014-07-28 09:00:43.703 xcodebuild[35326:1912070] [MT] DVTAssertions: Warning in /SourceCache/IDEFrameworks/IDEFrameworks-6244.6/IDEFoundation/SourceControl/Model/IDESourceControlManager.m:432
  Details:  Error Domain=com.apple.dt.IDESourceControlErrorDomain Code=-1 "Missing extension: public.vcs.subversion" UserInfo=0x7fb4a2cb14a0 {NSLocalizedDescription=Missing extension: public.vcs.subversion}
  Object:   &lt;IDESourceControlManager: 0x7fb4a072c9e0&gt;
  Method:   -loadRepositories
  Thread:   &lt;NSThread: 0x7fb4a0605350&gt;{number = 1, name = main}
  Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.
  ** ARCHIVE FAILED **
  
  
  The following build commands failed:
      DataModelVersionCompile /Users/seanzehnder/Library/Developer/Xcode/DerivedData/FieldApp-heytvqitcxovbbegdtzbrxjofaty/Build/Intermediates/ArchiveIntermediates/FieldApp-RELEASE/InstallationBuildProductsLocation/Applications/Visit\ Tracker.app/FieldApp.momd DataModel/FieldApp.xcdatamodeld
      DataModelVersionCompile /Users/seanzehnder/Library/Developer/Xcode/DerivedData/FieldApp-heytvqitcxovbbegdtzbrxjofaty/Build/Intermediates/ArchiveIntermediates/FieldApp-RELEASE/InstallationBuildProductsLocation/Applications/Visit\ Tracker.app/FieldApp.momd DataModel/FieldApp.xcdatamodeld
  (2 failures)
  </code></pre>