Add Anvi’o metagenomics community and framework. (#189)

Co-authored-by: Matthias Zepper <MatthiasZepper@users.noreply.github.com>

README.md

@@ -132,6 +132,7 @@ Pipeline frameworks & libraries
 Workflow platforms
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 * [ActivePapers](http://www.activepapers.org/) - Computational science made reproducible and publishable.
+* [Anvi’o](https://anvio.org/) - A community and framework centered around metagenomics, designed to facilitate reproducible exploration and visualization of data.
 * [Apache Iravata](https://airavata.apache.org/) - Framework for executing and managing computational workflows on distributed computing resources.
 * [Arteria](https://arteria-project.github.io/) - Event-driven automation for sequencing centers. Initiates workflows based on events.
 * [Arvados](http://arvados.org) - A container based workflow platform.