doc: README

.gitignore

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 !/**/
 !*.*
 !Makefile
+# Output XMLs
+*.xml
 # Created by https://www.toptal.com/developers/gitignore/api/database,go,visualstudiocode
 # Edit at https://www.toptal.com/developers/gitignore?templates=database,go,visualstudiocode
 

README.md

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 # Whatsup-Poll
-Scheduled Whatsapp Polls using go [whatsmeow](https://github.com/tulir/whatsmeow), which now also has python bindings with [neonize](https://github.com/krypton-byte/neonize).
+CLI Whatsapp Polls using go:
+- [whatsmeow](https://github.com/tulir/whatsmeow), which now also has python bindings with [neonize](https://github.com/krypton-byte/neonize).
+- [urfave/cli](https://github.com/urfave/cli) for the command line
+
+# Usage
+Simply pass the content of the `id` field of your group as CLI argument.
+Can be easily scheduled using `crontab` because of its non-interactive operation.