Change behaviour of the object CommandLine. It was taking a file in YAML or JSON
before but now it take directly the configuration.
Renaming YAML loader class.
Remove __FILE__ behaviour on 'execute' which doesn't work anymore since
constructor take configuration directly.
Rewrite method for adding a parser and add a method for checking parser
configuration.
Save parsers objects in an attribute instead of the configuration. Saving
directly in the configuration may have be problematic with YAML anchors.
Add documentation sources (Sphinx).
Updating setup and README for 0.2 version.
Updating gitignore file for README and PyPi.