update README

README.md

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 # soundscape-qt
 
-Desktop application to play a combination of sounds, e.g. natural sounds
-produced by animals or wind and water.
+[![GitHub release](https://img.shields.io/github/release/ddanilov/soundscape-qt)](https://github.com/ddanilov/soundscape-qt/releases/)
+
+[**soundscape-qt**](https://github.com/ddanilov/soundscape-qt) is an open source
+desktop application to play a mix of sounds, e.g. natural sounds produced by
+animals or wind and water.
+
+## Usage
+
+**soundscape-qt** itself comes with no sounds, however you can use example
+soundscapes provided in
+[soundscape-examples](https://github.com/ddanilov/soundscape-examples)
+repository to test the functionality of the application. Load one of the
+`*.json` files into the application, and it will import and play the included
+media files. Use mouse right-click in the main window or on the tray icon to
+access application menu where you can add or remove soundtracks and change their
+settings.
+
+[Freesound](https://freesound.org/) is a good source of sounds for your own
+soundscapes.
+
+## Installation
+
+Prebuilt binaries for Microsoft Windows are avaiable from the
+[Releases page](https://github.com/ddanilov/soundscape-qt/releases).