Remove use of global br object in Open Library record callbacks.  Fix issue on IE8 with bad 'this'.
Remove use of global br object in Open Library record callbacks.  Fix issue on IE8 with bad 'this'.

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