Add current song feature for darwin

[drewrey]

• ~~Re-use sys.stdout.encoding. When can this value be None, and how should that be handled?~~ PS: see this comment
• Use sys.getfilesystemencoding when decoding.
  • This seems related to #30.

[drewrey]

Here is an example screenshot:

[drewrey]

Perhaps instead of sys.stdout.encoding, this should be handled with sys.getfilesystemencoding? In particular:

Changed in version 3.2: getfilesystemencoding() result cannot be None anymore.

[bjarneo]

Sweet. I'll take a closer look this weekend. :)

[bjarneo]

@drewrey Sounds logical to use getfilesystemencoding. :+1:

[drewrey]

@bjarneo updated accordingly.

[bjarneo]

Awesome! Thank you!