#132 Allow to set the encoding for file name and meta tags

[Max Mukhin]

I'd like to be able to set the encoding for the Cyrillic song names and artists. Using the default enconding (I believe it's UTF-8) creates the incorrect file names and meta tags, i.e. Черная Речка - Праздник

Related forum thread: http://sourceforge.net/p/streamripper/discussion/19083/thread/47f88d74/