1.0.0.beta.1

Enhancements

• Add accessors for working with Environment Variables in .xcscheme files.
  Justin Martin
  #326
• Add method to create new variant groups (groups for localized versions of
  the same file).
  Tim Bodeit
  #315
• Added target type for TV application extensions.
  Boris Bügling
  #318
• Added .hxx to the list of recognized header file extensions.
  Jason Vasquez
  #320
• Added basic Xcodeproj::Workspace APIs to support groups.
  David Parton
  #322
• Added a helper to set the deployment target on a target based on its
  platform.
  Samuel Giddins
• Added support for projects tracking if they have been modified.
  Samuel Giddins
  #202
• The plist serializer can now be switched to different implementations,
  which will get autoloaded on-demand.
  Samuel Giddins
• Simply requiring xcodeproj on a ruby installation without the fiddle gem
  will not cause an exception -- that exception has been delayed until actually
  attempting to serialize / load a plist file.
  Samuel Giddins

Bug Fixes

• Avoid duplicating settings with multiple values in common when merging.
  Samuel Giddins
  CocoaPods#3652
• Avoid duplicating settings with common prefixes when merging.
  Samuel Giddins
• Escape XML entities in project names when writing workspace.
  Caesar Wirth
  CocoaPods#4446
• Serialized configs will now have a trailing newline appended.
  Samuel Giddins