update readme

README.md

@@ -1,18 +1,10 @@
-# mara-cli: Mara commandline app
+# Mara CLI
 
-A 'mara' command which exposes contributed click commands. Contributed click 
-commands are exposed as subcommands. It automatically finds the 
-`compose_mara_app()` function of your app, executes it, and then calls the 
-appropriate subcommand.
-
-
-## Contributed MARA_* functionality in this package
+[![Build status](https://github.com/mara/mara-cli/actions/workflows/build.yaml/badge.svg)](https://github.com/mara/mara-cli/actions/workflows/build.yaml)
+![PyPI - License](https://img.shields.io/pypi/l/mara-cli.svg)
+[![PyPI version](https://badge.fury.io/py/mara-cli.svg)](https://badge.fury.io/py/mara-cli)
+[![Slack Status](https://img.shields.io/badge/slack-join_chat-white.svg?logo=slack&style=social)](https://communityinviter.com/apps/mara-users/public-invite)
 
-none
-
-## Consumed MARA_* functionality
+A 'mara' command which exposes contributed click commands. Contributed click 
+commands are exposed as subcommands. It automatically provides click commands in entry point `mara.commands` of all installed libraries.
 
-This consumes the `MARA_CLICK_COMMANDS` functionality.  `MARA_CLICK_COMMANDS` 
-must be an iterable which yields `@click.command()` decorated functions 
-(either an iterator or a functions which returns a list or a list of such 
-functions).