updated README

Author: dmeroff

README.md

@@ -1,2 +1,38 @@
-Yii2-user documentation
-=======================
+# Yii2-user documentation
+
+This documentation is based on Yii2-user master branch.
+
+Documentation is rendered by Read The Docs and is available online. You can see online documention
+on [http://yii2-user.readthedocs.org](http://yii2-user.readthedocs.org/en/latest/).
+
+
+## Building documentation
+
+Building the documentation requires [Sphinx](http://sphinx-doc.org/).
+
+Descend into the `docs/` directory, and run `make` with one of the following
+targets:
+
+- `html` - build HTML documentation
+- `epub` - build epub (ebook) documentation (requires
+- `help` - build Windows help files
+- `info` - build Unix info pages
+- `latexpdf` - build PDF documentation (requires a working `latex` toolchain)
+- `man` - build Unix manpages
+- `text` - build ANSI text manual files
+
+Examples:
+
+```bash
+$ make html
+```
+
+You can cleanup by running `make clean`.
+
+## Contributing
+
+You can see contributing instructions in [CONTRIBUTING.md](CONTRIBUTING.md)
+
+## License
+
+Yii2-user documentation is released under the MIT License. See the bundled [LICENSE.md](LICENSE.md) for details.