0.1.0-beta.2

• Add SubtitleController and its feature like:
  • Binary search for single search by providing the duration.
  • Multi result search by providing the duration.
• Re-architect the files of project.
• Update regex of VttRegex and SrtRegex.
• Fix SubtitleParser bug when decoding the subtitles.
• You can normalize the subtitle text data while decoding, like remove css styles.
• Manual provide of the SubtitleType, or leave it to detected auto.
• Fix dart:io bug to support dart js and flutter web by using universal_io package.
• Reducing non-required dependency http package.
• 3 examples added.