Update README.md

README.md

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 # alfie <img src="alfie/data/alfie.jpeg" height="140" align="right" alt="Alfie"/>
 ## alignment free identification of eDNA
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-[![DOI](https://doi.org/10.3897/mbmg.4.55815)](https://doi.org/10.3897/mbmg.4.55815)
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