v3.0.0 - No more FFmpeg

• Removed dependency to FFmpeg from this package (reasons)
• New complete control over the command generation using commandBuilder in VideoFFmpegVideoEditorConfig
  • Removed VideoExportPreset, you can specifies it using the commandBuilder.
  • Removed customInstruction, you can now custom the command using the commandBuilder.
• The exportation is now very fast if there is no filter #140
• Fix assert error while triming #157
• New coverThumbnailsQuality and trimThumbnailsQuality in controller
  • Removed quality in CoverSelection, instead uses coverThumbnailsQuality
  • Removed quality in ThumbnailSlider, instead uses trimThumbnailsQuality
  • Removed quality in TrimSlider, instead uses trimThumbnailsQuality