Added base for CoverTypes. And sorting, grouping and displaying by/of the CoverType in the GUI.
darktown.boo and lastfm-cover.boo support now coverTypes. EncodeUrlIsoLatin1 moved to util.boo
AlbumArt and ScriptResult: old constructors should just call the new constructors. ArtPanel.generic.xaml: Added two times a new line. CoverTypeEnum.cs now call CoverType.cs
Usage of coverTypes where possible, and isoLatin1 where necessary
ArtPanel.cs reverted to 133
Now all images of an item are displayed. The one with the category == "primary" is assumed to be the front cover.
New script for freecovers, using the API and retrieving covers in size of 400*400
Usage of coverTypes where possible, and isoLatin1 where necessary