First commit towards a linking move_file().
Now reads config['import']['link'], style fix and default setting added.
Style fixes.
Failing to link a file now throws a FilesystemError.
Merge branch 'master' of https://github.com/sampsyo/beets
Should have corrected some of the style checking errors.
Merge branch 'master' of https://github.com/sampsyo/beets
Merge branch 'master' of https://github.com/sampsyo/beets

Conflicts:
	beets/library.py
Add lastimport plugin by @rafi

From rafi/beets-lastimport at 72c199d599ee76f2a5fa366a032ad33491f2c82c.
Safer GET parameter formulation for AS URL
Style fixes
Use MatchQuery for mb_trackid lookup
Use shared Last.fm API key
ftintitle: add 'auto' option
restoring ft_in_title implementation
register import hook only if needed
restore write argument for ft_in_title
move metadata management in command function
Little typo
Added "ifempty" config to embedart plugin, re: issue 1020