message: Use LINEAR/LINEAR_MIPMAP_LINEAR as the default sampling methods
  If the glTF file defines bits of the sampler but not the min/mag filters,
  gltfio otherwise uses NEAREST. And it looks bad.
diff: @@ -61,7 +61,7 @@ inline filament::TextureSampler::MinFilter getMinFilter(cgltf_int minFilter) {
  case GL_LINEAR_MIPMAP_LINEAR:
  return filament::TextureSampler::MinFilter::LINEAR_MIPMAP_LINEAR;
  }
  - return filament::TextureSampler::MinFilter::NEAREST;
  + return filament::TextureSampler::MinFilter::LINEAR_MIPMAP_LINEAR;
  }
  inline filament::TextureSampler::MagFilter getMagFilter(cgltf_int magFilter) {
  @@ -71,7 +71,7 @@ inline filament::TextureSampler::MagFilter getMagFilter(cgltf_int magFilter) {
  case GL_LINEAR:
  return filament::TextureSampler::MagFilter::LINEAR;
  }
  - return filament::TextureSampler::MagFilter::NEAREST;
  + return filament::TextureSampler::MagFilter::LINEAR;
  }
  inline bool getVertexAttrType(cgltf_attribute_type atype, filament::VertexAttribute* attrType) {
  