#202, #224 simplify configation - alternative to #6

this is an alternative to https://github.com/AdventurePHP/code/pull/6

as mentioned in http://tracker.adventure-php-framework.org/view.php?id=202#c455 it would be better if there is no need to apply another parameter when using the configuration.

I followed suggestion b) and use a fix delimiter in the baseConfiguration.
why dont you use $sectionDelimiter here instead of '.'?