Changed thumbnail sizing default to be fixed width (this.thumbWidth)
Changed thumbnail sizing default to be fixed width (this.thumbWidth)

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