add license file and readme per #72 and #70

LICENSE

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+The Alpheios version of morpheus is a fork of the Perseus Digital Library's morpheus parser https://github.com/PerseusDL/morpheus. 
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+While it does not explicity assign a license to morpheus, the Perseus Digital Library's github repository for morpheus provides the following information.
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+Tufts University holds the overall copyright to the Perseus Digital Library; the materials therein (including all texts, translations, images, descriptions, drawings, etc.) are provided for the personal use of students, scholars, and the public.
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+Materials within the Perseus DL have varying copyright status: please contact the project for more information about a specific component or object. Copyright is protected by the copyright laws of the United States and the Universal Copyright Convention.
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+Unless otherwise indicated, all contents of this repository are licensed under a Creative Commons Attribution-ShareAlike 3.0 United States License. You must offer Perseus any modifications you make.

README.md

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+This is a legacy port of the morpheus parser, code which originates from the Perseus Digital Library.
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+The Alpheios version of morpheus differs primarily in that it adds an XML API interface to the output.
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+This repository includes binary versions of the morpheus code that were built many many years ago and likely do not run on recent versions of the various operating systems. Likewise the makefiles included here are not up to date for recent versions of GCC.
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+The github workflow file does include build instructions that worked as of 2024. The github workflow file was copied from the Perseids project version of morpheus at https://github.com/perseids-tools/morpheus. That repository may have more up to date makefiles.
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+The only data in this repository that is still being updated are the stemfiles, for which we welcome pull requests. Contributions of changes to these files that build successfully will be deployed to the Alpheios morphology service for as long as we are able to support that service.
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+Alpheios is a 501(c)3 non-profit that is fully funded by public contributions and no longer has an active development team. If you are interestsed in learning more about the Alpheios project generally see https://alpheios.net . If you would like to learn more about the Alpheios code, including how it makes use of morpheus, see https://github.com/alpheios-project/documentation.