+++++
* Adds support for positional arguments with the .positional helper method on ArgumentsContext.
* Removes the necessity for the type field in help.py. This information can be inferred from the class, so specifying it causes unnecessary crashes.
* Adds support for examining the result of a command after a call to invoke. The raw object, error (if any) an exit code are accessible.
* Adds support for accessing the command instance from inside custom commands by putting the special argument cmd in the signature.
* Fixes an issue with the default config directory. It use to be .cli and is now based on the CLI name.
* Fixes regression in knack 0.4.5 in behavior when cli_name --verbose/debug is used. Displays the welcome message as intended.
* Adds ability to specify line width for help text display.