Re #2449

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