Freedman May 2014 Updates to Piece.html

Proposed _removal_ of all links for selection of different Reconstructions.  These will instead be done with Zoltan's meiViewer (to be added as <div> at bottom of page, as indicated in base.html).

Merge these changes only AFTER meiView is working on Piece.html, since we have no other means of displaying the reconstructions now other than with musicXML>MEI using Raff's system.

Relocated 'add to favorites'
Added links to MEI and MP3 files