More refactoring of layout code in 2up.  WIP
More refactoring of layout code in 2up.  WIP

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