HyperTunes updated

Here's what's new:

• Directly browse and preview parts, sections, progressions, and song in dedicated tabs
• Projects are now loaded on demand (for faster app launching)
• Can import user soundbanks (DLS or SF2 format) from iTunes. Soundbank is selectable per song.
• Splitting/labeling now applies to the arrangement as a whole, not a single section
• Can now email an entire project from within the app
• Can now export an entire project to iTunes sharing
• Open zip (of MIDI files) in HyperTunes (e.g, from email)
• Open HyperTunes project in HyperTunes (e.g, from email)
• Assign parts directly in Section screen, without drilling down to Part screen first
• Press to enable/disable parts right in the Section screen