update README info

README.md

-# legTools
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+# legTools 0.1-0
+
+An R package containing convenience functions, small GUI to teach
+statistics and some datasets.
+
+## Introduction
+
+legTools is a collection of R functions and datasets, maintained by the
+LEG group (Statistics and Geoinformation Laboratory, *Laboratório de
+Estatística e Geoinformação*).
+
+## Download and install
+
+## Documentation
+
+## License
+
+This package is released under the
+[GNU General Public License (GPL) v3.0][].
+
+See [LICENSE](./LICENSE)
+
+
+<!-- links -->
+
+[GNU General Public License (GPL) v3.0]: http://www.gnu.org/licenses/gpl-3.0.html