v0.6 renamed Options to Settings
v0.6 refactor source, cache and index variable and function naming
v0.6 moved index files to index subdirectory
v0.6 display file name when loading/saving index, display file date when loading index, display current playlist as default in playlist dropdown, passing index filename to SaveBatch, displaycovers after changing playlist, change labels in settings dialog box
v0.6 skinning basics
v0.6 skinning progress