Move two page display into GBtwopageview, similar to GBpageview
Move two page display into GBtwopageview, similar to GBpageview

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