add readme with explanation and roadmap

README.md

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+# Obj2Html
+This lib is able to transform an .obj file to HTML that use three.js.
+In this way it is possible to have an interactive 3D view that can be used on the browser or into a jupyter notebook.
+
+## Features
+- [] .obj files support
+- [] guide for notebook
+- [] pipy delivery
+- [] .mat files support
+
+# References
+In this chapter I add at least a link for each of the knowledge needed for develop this project.
+* python
+* git
+* how to use setup.py
+* python test
+* coverage
+* gitlab ci/cd
+* three.js