Update to version 0.2.0

Changelog:

• quiet batch mode (not available on OSX) - #13
• bugfixes in Napisy24 engine - #23
• icons placed at directories according to their sizes - #24
• HiDPI display awareness (OSX) - #27
• support for paths containing special characters (Windows) - #28
• bugfixed SRT conversion adding empty lines to resulting file (Windows) - #29
• application self-closing in batch mode (OSX) - #31
• added version information to .exe file (Windows) - #32
• bugfixes in file encoding detection (UTF-8 with BOM amongst others) - #34
• preserving original file encoding during subtitle format conversion
• bugfixed backup language support - #36