Refactor and API stabilization

[TimonPost]

• Major refactor and cleanup.
• Improved performance;
  • No locking when writing to stdout.
  • UNIX doesn't have any dynamic dispatch anymore.
  • Windows has improved the way to check if ANSI modes are enabled.
  • Removed lot's of complex API calls: from_screen, from_output
  • Removed Arc<TerminalOutput> from all internal Api's.
• Removed termios dependency for UNIX systems.
• Upgraded deps.
• Removed about 1000 lines of code
  • TerminalOutput
  • Screen
  • unsafe code
  • Some duplicated code introduced by a previous refactor.
• Raw modes UNIX systems improved
• Added NoItalic attribute