Implemented --all option to dump command

`dump` command now accepts `--all` / `-a` option.
This makes it possible to display protected and private properties.

Presenter interface has been updated in that regard, and all implemented presenters.
Merge branch 'feature/always-colorful' into object_presenter_protected_properties

Conflicts:
	src/Psy/Command/DumpCommand.php
	src/Psy/Presenter/ArrayPresenter.php
	src/Psy/Presenter/ClosurePresenter.php
	src/Psy/Presenter/ObjectPresenter.php
	src/Psy/Presenter/Presenter.php
	src/Psy/Presenter/PresenterManager.php
	src/Psy/Presenter/RecursivePresenter.php
	src/Psy/Presenter/ResourcePresenter.php
	src/Psy/Presenter/ScalarPresenter.php
Add protected/private indication to `dump -a`
Merge branch 'feature/presenters-and-colors' into develop
Support newer PHPUnit.
dev-master is 0.2.0-dev