Update README.md

README.md

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 # glyptodon
 
-Glyptodon is a manuscript annotation tool that uses ipywidgets, Bokeh, and Panel libraries to make a web application for manuscript annotation
+Glyptodon is a manuscript annotation tool that uses [Dash](https://dash.plotly.com/) and [Plotly](https://plotly.com/python/).
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+At present, it can accept manuscript images for most image formats and manuscript transcriptions in xml.
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+It cannot use the transcriptions uploaded in xml yet, but it should be able to in future updates.
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+The purpose of this tool is to create and utilize physical document transcriptions for the digital humanities.