Make LFMTag accessible form outside
Use SDURLCache

it's just more convenient during development
removing -Wundeclared-selector by declaring the methods in LFMData
Fix problem where yearto is empty
Testing for PropertyMapper
tags workaround

Instead of an empty array, the API returns a white space string if no tags are available. The Mapper crashes so I catch is problem in my custom method.
More data definition

* adding LFMArtist to LFMAlbumTopAlbum
	* Generalizing LFMArtist with 3 properties
* fixing static usage of image strings
* TODO: seriously improve the mapping performance!!
Going back to methods

Property Mapper had massive performance problems with the way I used it.