Added readme.md explaining how to get a release build (among other th…

…ings)

readme.md

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+# native2asciiplug
+
+Intellij IDEA plugin which converts property files with native-encoded characters (characters which are non-Latin 1
+and non-Unicode) to Unicode-encoded. Processing is being done automatically during compilation phase.
+
+Available through Intellij IDEA Plugin Repository ([link](http://plugins.jetbrains.com/plugin/?id=6155)).
+
+## Development
+
+```sh
+git clone https://github.com/shyiko/native2asciiplug.git
+cd native2asciiplug
+# update gradle.properties according to your environment
+./gradlew clean zip # creates a zip file in build/distributions
+```
+
+## License
+
+[Apache License, Version 2.0](http://www.apache.org/licenses/LICENSE-2.0)