Pull Request #871 Add command listing functionality

* Add `list_commands`, `command_description`, and `command_usage` methods to `lib/travis/cli.rb`
* Add `list_commands`, `command_description`, and `command_usage` methods to `lib/travis/cli/command.rb`
* Modify `run` method in `lib/travis/cli/help.rb` to use the new methods

Giorgi Meskhidze avatar Giorgi Meskhidze

Pull request event #1639 failed

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