0.34.0.rc1

• Add support to specify dependencies per build configuration.
  This can be done using the following syntax in a Podfile:

  pod 'Lookback', :configurations => ['Debug']
  

  Currently configurations can only be specified per single Pod.
  Joachim Bengtsson
  Eloy Durán
  Fabio Pelosin
  #52
  #154

• Added methods deprecated? and deprecation_description to
  RootAttributesAccessors.
  Hugo Tunius
  #157
  CocoaPods#2180

• The specification requires_arc attribute now defaults to true.
  Fabio Pelosin
  CocoaPods#267

• Now the specification linter warns if git sources use SSH URLs.
  Fabio Pelosin
  CocoaPods#118

• Removed legacy deprecation warnings of the Specification DSL.
  Fabio Pelosin

• Improved error messages for merge conflicts of the Podfile.
  Taylor Halliday
  #147

• Only allow certain extensions for license files.
  Samuel Giddins
  CocoaPods#2407

• The linter now checks a JSON specification for unknown keys.
  Fabio Pelosin
  #88

• Exported JSON files have a trailing newline
  Fabio Pelosin
  #139