Download individual songs

I've reworked the download page, and you can now download individual songs as well as the complete album. Previously, you could only download complete albums.

This is what the new download page looks like:

The biggest change is in how the page is organized. There are now 3 sections to the page:

• download the entire album
  
• download individual songs
  
• download artwork

The individual songs are available in MP3, WAV, M4A and OGG Vorbis file formats.

I've also reorganized the page to (hopefully) make it less cluttered and easier to see see what is available.

Naturally, since only download members can download music from Magnatune, this improvement only benefits those great and wonderful people.