v0.4.0

This is major release with some API changes.

Added

• Commands definition can now be specified with the class docstring (support for string signature)
• Two other levels of verbosity (-vv and -vvv) have been added
• Commands description can now be output as json and markdown

Changed

• The Command class is now more high-level with a single handle() method to override and useful helper methods
• The ProgressHelper has been removed and the ProgressBar class must be used
• The TableHelper has largely been improved
• DialogHelper has been replaced by a more robust QuestionHelper
• Command.set_code() logic has changed to accept a Command instance to be able to use the new helper methods
• Autocompletion has been improved

Fixed

• Values are now properly cast by validators
• Fixing "flag" not being set properly
• Progress bar now behaves properly (Fixes #37)
• The -n|--no-interaction option behaves properly