Modify bunch of stuff.

- Modify aggregator factory framework (glob search).
- Add options to audiopia utility.
- Rename classes.
- Extend static_collection (previously bucket_collection).
- Set timeout to 100 milliseconds in async_collection (instead of 1000).
- Fix bug in sort_collection class.
- Add spotify_resource to the resource factory.
Merge branch 'master' of github.com.

Conflicts:
	libs/core/Jamfile
	libs/core/inc/audiopia/resource.hpp
	libs/core/inc/audiopia/static_collection.hpp
	libs/core/src/static_collection.cpp
	libs/spotify/Jamfile
	utils/audiopia.cpp