Add switch_to_tv method
Color highlight the current track in the queue.
Use Colorama for cross-platform Ansi colors.
Optional import of colorama.
Fixed comments.
Added ANSI_BOLD and ANSI_RESET constants.
Reverting inadvertent changes to topology code. Fixes #78
Merge pull request #70 from jzting/master

Add TV input for Playbar
Merge pull request #72 from petteraas/color_current_in_queue

 Color highlights the current track in the queue.