CRUD - fix indentation
.gitignore appends
composer.json - add require-dev and autoload sections
phpunit - add phpunit base configuration
InaccessiblePropertiesProtectorTraitTest - tests for InaccessiblePropertiesProtectorTrait
InstanceCreationDisallowerTrait - trait preventing creation of class instance
InstanceCreationDisallowerTraitTest - tests for InstanceCreationDisallowerTrait