Remove trailing commas in property definitions since IE7 can't handle it.
Remove trailing commas in property definitions since IE7 can't handle it.

niksu/bookreader,Islandora/internet_archive_bookreader,Islandora/internet_archive_bookreader,niksu/bookreader,yankl/bookreader,openlibrary/bookreader,Islandora/internet_archive_bookreader,niksu/bookreader,gootdude/bookreader,brisandbeans/bookreader,yankl/bookreader,brisandbeans/bookreader,garyrh/bookreader,garyrh/bookreader,openlibrary/bookreader,Islandora/internet_archive_bookreader,nikolas/bookreader,niksu/bookreader,openlibrary/bookreader,internetarchive/bookreader,openlibrary/bookreader,openlibrary/bookreader,brisandbeans/bookreader,yankl/bookreader,gootdude/bookreader,brisandbeans/bookreader,niksu/bookreader,garyrh/bookreader,yankl/bookreader,Islandora/internet_archive_bookreader,internetarchive/bookreader,garyrh/bookreader,brisandbeans/bookreader,gootdude/bookreader,gootdude/bookreader,nikolas/bookreader,garyrh/bookreader,yankl/bookreader