3mf Importer - 1st installment

xs/src/libslic3r/Format/3mf.hpp

@@ -0,0 +1,12 @@
+#ifndef slic3r_Format_3mf_hpp_
+#define slic3r_Format_3mf_hpp_
+
+namespace Slic3r {
+
+    class Model;
+
+    // Load an 3mf file into a provided model.
+    extern bool load_3mf(const char* path, Model* model, const char* object_name = nullptr);
+}; // namespace Slic3r
+
+#endif /* slic3r_Format_3mf_hpp_ */