Fixed #453 and added test cases
Minor adjustments based on feedback
Removed str2bool import
Merge pull request #696 from ayberk/master

Fixed #453 and added test cases
changelog for #696
fix Windows path manipulation in importfeeds
tests: use Windows config location on Windows

Only 10 test failures remain on my system!
docs: add missing ReST :ref:
Add tests for duplicate album imports
Test import singleton duplicates
Refactor ImportDuplicateAlbumTest
Remove DuplicateCheckTest

Superseded by `ImportDuplicate*Test`.
Test that duplicate files are removed
Add plugins.Registry and migrate code
Plugin events are now methods
Fix typo
Format index is required in python 2.6
Make plugin config a property
Remove name from initializer

Only the plugin registry must instantiate plugins, and it does not use the name
arguemnt.
Make plugin name a property

None of the plugins does use this to set a name.