Delete "extra" files after album import

[GoogleCodeExporter]

We could find lot of useless files when downloading music albums (legally for 
sure :p)

Ex :

/Downloads/Queen - Night at the Opera (1990)/extras/back.jpg
/Downloads/Queen - Night at the Opera (1990)/extras/front.jpg
/Downloads/Queen - Night at the Opera (1990)/extras/live 2012.mp3
/Downloads/Queen - Night at the Opera (1990)/01 Track.mp3
/Downloads/Queen - Night at the Opera (1990)/02 Track.mp3 
/Downloads/Queen - Night at the Opera (1990)/03 Track.mp3 
/Downloads/Queen - Night at the Opera (1990)/04 Track.mp3 
/Downloads/Queen - Night at the Opera (1990)/05 Track.mp3 
/Downloads/Queen - Night at the Opera (1990)/readme.txt
/Downloads/Queen - Night at the Opera (1990)/uploaded-by-MAsTer-UploaDer.nfo
/Downloads/Queen - Night at the Opera (1990)/folder.jpg
/Downloads/Queen - Night at the Opera (1990)/cover.jpg
/Downloads/Queen - Night at the Opera (1990)/Look.At.My.Other.Uploads.url

So here we are : 50% of thoses files above are useless and when downloading 
severals albums, it take a lot of time to clean up everything.

I think about two options in .beetsconfig to do the job :

delete-files: readme.txt *.nfo *.jpg .DS_Store
=> Will delete only files that match above pattern (after import)
=> Default : ''

delete-folder: yes
=> Will delete the entire album folder after import regardless to remaining 
files in it
=> Default : no

What do you think about this ?

Original issue reported on code.google.com by [email protected] on 1 Aug 2012 at 4:41

[untitaker]

Do not comment here, but on beetbox/beets#145