update phpunit version

load dotenv before error handling logic

ServerLog tests

Load /initialize.php before index if it exists

Don't override default parameters with null

XML Serializer : Modified order of member functions for readability

added tests for debug output class

Refactoring

 - remove database_listeners config and combine it with database.php
 - added bootstrap.php for loading .env, other config  and regestering db listeners

Update recommended require version in README

bin/rAPId - remove rAPIdConfig.php from composer autoload