added taglib to nuget packages; added packages to gitignore
added code for parsing tags of mp3s after extract, and for displaying
album info of extracted album.
started adding infrastructure for supporting a multi-step process.
added BrowseBox control for picking the zip.
Added AlbumInfoViewer control for displaying AlbumInfo objects.
Added MockAlbumInfo to mockup content for viewing in the designer
 - got rid of that "steps" nonsense.
 - added autoprocessing/extracting and reading of id3 tags as soon as you
pick an album. need to add something to clean up temp files on exit.
 - added import code to copy files from temp to specified music library