1.5.0

Enhancements

• Add add_legacy_target method to ProjectHelper
  Dimitris Koutsogiorgas
  #491

• Provide ability to update schemes as they are being recreated
  Dimitris Koutsogiorgas
  #490

• Use test_target_type? when adding testable reference
  Dimitris Koutsogiorgas
  #487

• Add test reference to xcscheme if target is of type test
  Dimitris Koutsogiorgas
  #485

• Make build settings parsing optionally take into account any associated
  xcconfig files and project settings.
  Renzo Crisóstomo
  #180

• Add command_line_arguments to TestAction.
  Brently Jones
  Danielle Tomlinson
  #492

Bug Fixes

• Do not crash when there are no BuildActionEntries in a scheme.
  Danielle Tomlinson
  #486