Begins

* Ensure mock package gets installed on testing.

* First beta release
* Sphinx documentation available on Read The Docs
* Fix compatability between extension and convert decorators

* Boolean flags create both '--opt' and '--no-opt' command line options
* Replace '_' with '-' in command line option flags
* Enable creating sub-commands with a specified name
* Custom help formatters for control command line help output
* Create positional command line arguments for required parameters
* Published Python wheel packages to PyPI to improve install times
* Deprecate context.return_value for context.last_return and
context.return_values

* Fix incompatability between automatic type conversion and command line flags

* New utility functions tofile and tolist
* Fix bug prevent help output with main function that takes on arguments
* Multiple subcommands support can be enabled with cmd_delim
* Context object available to main and subcommand functions for storing state
* Optional automatic type conversion for begin.convert and begin.start
* Command line flags for options with boolean default values

* Allow listing of optins in alphabetical order
* Allow suppression of short options