v0.2.0 stable

This is the first official release.

It contains:

• Popup message about volume level change added
• "About" dialog added
• Stability and performance improvements.

Changes planned for next release:

• Add option to change font, size, color, opacity and position of popup message
• Translate tool to different languages

First pre-release

Basic features support:

• volume control by hotkeys
• persistent user-defined config of hotkeys
• auto start with Windows

Changes planned for next release:

• help/about window
• performance and stability tests and improvements