Implemented class name validator for describe command
Updated class name validator implementation. Fixes #129
Updated class name validator implementation.
Updated class name validator implementation.
Updated class name validator implementation.
Update class name validator implementation.
Update class name validator implementation.
Merge branch 'master' into psr0-validator
Removed validation logic from describe command
Implemented PSR0 validation in PSR0Locator class
Implemented PSR0 validation in PSR0Locator class
Implemented PSR0 validation in PSR0Locator class
Implemented PSR0 validation in PSR0Locator class
Added behat as a dev dependency.
Initialized the features folder.
Added the expect helper to dev dependencies.
Refactored formatters to be registered as services.

This should make it easier to provide custom formatters in extensions.
Moved the StatisticsCollector to the constructor as well and re-added junit
Made the ReportItemFactory a non-nullable argument

Passing null was triggering a fatal error anyway.
Added "Describing a class" feature.