Initial import of Red Planet v4.10 Win32 source

Imports the current Win32 source for the pod-racing game 'Red Planet',
built on the MUNGA engine and its L4 (Win32/DirectX) platform layer:

- MUNGA / MUNGA_L4: cross-platform engine core and Win32 backend
- RP / RP_L4: Red Planet game logic and Win32 application
- DivLoader, Setup1: asset loader and installer project
- lib, MUNGA_L4/openal, MUNGA_L4/sos: third-party audio dependencies

Removed stale Subversion metadata and added .gitignore/.gitattributes.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

MUNGA/MTRXSTK.cpp

@@ -0,0 +1,42 @@
+#include "munga.h"
+#pragma hdrstop
+
+#include "mtrxstk.h"
+
+AffineMatrixStack& AffineMatrixStack::Concatenate(const AffineMatrix& matrix)
+{
+	AffineMatrix *old_top = Cast_Object(AffineMatrix*,Peek());
+	AffineMatrix *new_top = (AffineMatrix*)MemoryStack::Push();
+	new_top->Multiply(*old_top,matrix);
+	return *this;
+}
+
+LinearMatrixStack& LinearMatrixStack::Concatenate(const LinearMatrix& matrix)
+{
+	LinearMatrix *old_top = Cast_Object(LinearMatrix*,Peek());
+	LinearMatrix *new_top = (LinearMatrix*)MemoryStack::Push();
+	new_top->Multiply(*old_top,matrix);
+	return *this;
+}
+
+Matrix4x4Stack& Matrix4x4Stack::Concatenate(const Matrix4x4& matrix)
+{
+	Matrix4x4 *old_top = Cast_Object(Matrix4x4*,Peek());
+	Matrix4x4 *new_top = (Matrix4x4*)MemoryStack::Push();
+	new_top->Multiply(*old_top,matrix);
+	return *this;
+}
+
+Matrix4x4Stack& Matrix4x4Stack::Concatenate(const AffineMatrix& matrix)
+{
+	Matrix4x4 *old_top = Cast_Object(Matrix4x4*,Peek());
+	Matrix4x4 *new_top = (Matrix4x4*)MemoryStack::Push();
+	new_top->Multiply(*old_top,matrix);
+	return *this;
+}
+
+Matrix4x4& Matrix4x4Stack::Push(const AffineMatrix& matrix)
+{
+	Matrix4x4 *new_top = (Matrix4x4*)MemoryStack::Push();
+	return *new_top = matrix;
+}