core/apiRouter: add new Subsonic methods, make Subsonic methods reply to all HTTP methods.  Add httpRWLogger for debugging.
data: add AllFoldersByTitle() to retrieve alphabetical list of folders
subsonic/getMusicFolders: fix comment
subsonic: add new containers for routes, add basic Artist
subsonic/getLicense: initial commit
subsonic/getStarred: initial commit
subsonic/getIndexes: initial commit
subsonic/getMusicDirectory: initial commit