Just the last time now

I know this isn't out yet... Circular dependencies are fun right.

This feels so wrong.

[Command] Add option to configure project directory

[Command] Only set project directory if specified

[Specs] s/current working dir/project dir

[Command] Restore call to super in validate!

[Command] Make project directory parameter clearer

[Rubcocop] Fix argument alignmend in command.rb

[Command] Move project directory logic to its own module

[ErrorReport] List the installed plugins

Closes https://github.com/CocoaPods/CocoaPods/issues/2402

Conflicts:
	CHANGELOG.md

[ErrorReportSpec] Update spec to include plugins list

[Hound] Clean up error report

[Hound] Remove explicit curly braces for hash in error report spec

[ErrorReport] Ensure plugins are sorted

Use the new CLAide::PluginsHelper method

Conflicts:
	spec/unit/command_spec.rb

Addresses https://github.com/CocoaPods/CocoaPods/commit/0c80af37f1fec0009ad63277309afa47ad22595f#commitcomment-7718723.

Closes #2156.

Grammar

Thanks @segiddins

via @kylef

via @segiddins

via @segiddins

* origin/sandbox_reorganization_544:
  [Integration] Update
  [Integration] Update fixtures
  [Specs] Minor fix
  Rebuilding fixtures again.
  fixing .xcconfig tests and output.
  Fixed integration tests to work with sandbox.
  Regenerated integration files.
  Last unit test updates for sandbox.
  File references and target installer tests updated for new sandbox layout.
  Fixing more tests to look for files in the correct spots.
  Many test fixes.
  External sources and sandbox analyser spec tests fixed to work with new migrator.
  [WIP] Integrating migrator with tests.
  Initial work for sandbox reorganization

Conflicts:
	examples/AFNetworking iOS Example/AFNetworking iOS Example.xcworkspace/contents.xcworkspacedata
	lib/cocoapods/external_sources.rb
	lib/cocoapods/installer.rb
	lib/cocoapods/installer/target_installer.rb
	lib/cocoapods/sandbox.rb
	lib/cocoapods/sandbox/headers_store.rb
	spec/cocoapods-integration-specs
	spec/unit/external_sources_spec.rb
	spec/unit/generator/xcconfig/aggregate_xcconfig_spec.rb
	spec/unit/hooks/library_representation_spec.rb
	spec/unit/installer/analyzer/sandbox_analyzer_spec.rb
	spec/unit/installer/file_references_installer_spec.rb
	spec/unit/installer/pod_source_installer_spec.rb
	spec/unit/installer/target_installer/aggregate_target_installer_spec.rb
	spec/unit/installer/target_installer/pod_target_installer_spec.rb
	spec/unit/installer/user_project_integrator/target_integrator_spec.rb
	spec/unit/installer/user_project_integrator_spec.rb
	spec/unit/installer_spec.rb
	spec/unit/library_spec.rb
	spec/unit/project_spec.rb
	spec/unit/sandbox/headers_store_spec.rb
	spec/unit/sandbox_spec.rb
	spec/unit/target/aggregate_target_spec.rb
	spec/unit/target/pod_target_spec.rb