Fixed the fill density for rectilinear, triangular and cubic infills.

Initial implementation of the "infill link maximum distance" feature.
Parts of the perimeter connecting two infill lines will be dropped,
if longer than a given threshold.

xs/lib/Slic3r/XS.pm

@@ -147,9 +147,7 @@ package Slic3r::Filler;
 
 sub fill_surface {
     my ($self, $surface, %args) = @_;
-    $self->set_width($args{width}) if defined($args{width});
     $self->set_density($args{density}) if defined($args{density});
-    $self->set_distance($args{distance}) if defined($args{distance});
     $self->set_dont_connect($args{dont_connect}) if defined($args{dont_connect});
     $self->set_dont_adjust($args{dont_adjust}) if defined($args{dont_adjust});
     $self->set_complete($args{complete}) if defined($args{complete});