mk4 v1.0.0

Convert mkv videos into mp4 and burning subtitles on it.
Here is the available options:

• Delete the mkv file after conversion
• Convert very mkv videos inside a directory
• Choose audio and subtitles tracks for your new mp4
• Allow you to change the subtitles font and size in the configuration file
• Allow you to change the encoder in the configuration file
• Allow you to change the crf in the configuration file