Support for Koha 16.11+

in order to support Koha 16.11+ the plugin needs to:

• Use Koha::UploadedFiles instead of Koha::Uploads

    my $rec = Koha::Uploads->new({ id => $id, filehandle => 1 });
    my $fh = $rec->{fh}
    # vs
    my $fh = Koha::UploadedFiles->find( $id )->file_handle;

• Adapt to C4::Biblio::GetMarcBiblio api change. It now expects a hashref:

    my $record = GetMarcBiblio($biblionumber);
    # vs
    my $record = GetMarcBiblio({ biblionumber => $biblionumber });