Added plupload script to ease uploads of files. Several small improvements.

• Move download link to top of thank you page
• Always load profile to get any changes.
• Fix shipping standard plugin.
• Add link to edit profile from checkout page.
• Update user profile to add multi-language "Select a country" and "Select a region".
• Add Backordered text.
• Change javascript in audio_html5 so much shorter.
• Update mobile_css.