First version of README

Author: kelson42

README.md

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+# Libkiwix binding for Java/Kotlin
+
+![Maven Central](https://img.shields.io/maven-central/v/org.kiwix.kiwixlib/kiwixlib)
+[![CodeFactor](https://www.codefactor.io/repository/github/kiwix/java-libkiwix/badge)](https://www.codefactor.io/repository/github/kiwix/java-libkiwix)
+[![License: GPL v3](https://img.shields.io/badge/License-GPLv3-blue.svg)](https://www.gnu.org/licenses/gpl-3.0)