Add new hololens code (winrt + D3D immersive mode example)

support/hololens/ServoApp/Content/ShaderStructures.h

@@ -0,0 +1,20 @@
+#pragma once
+
+namespace Immersive {
+// Constant buffer used to send hologram position transform to the shader
+// pipeline.
+struct ModelConstantBuffer {
+  DirectX::XMFLOAT4X4 model;
+};
+
+// Assert that the constant buffer remains 16-byte aligned (best practice).
+static_assert((sizeof(ModelConstantBuffer) % (sizeof(float) * 4)) == 0,
+              "Model constant buffer size must be 16-byte aligned (16 bytes is "
+              "the length of four floats).");
+
+// Used to send per-vertex data to the vertex shader.
+struct VertexPositionColor {
+  DirectX::XMFLOAT3 pos;
+  DirectX::XMFLOAT3 color;
+};
+} // namespace Immersive