Added Line and Ray drawing

Sandbox/content/Shaders/lineShader.hlsl

@@ -0,0 +1,31 @@
+cbuffer Constants : register(b0)
+{
+    float4x4 ViewProjection;
+    float4 Color;
+};
+
+struct VS_Input
+{
+    float4 Position : POSITION;
+};
+
+struct PS_Input
+{
+    float4 Position : SV_Position;
+};
+
+PS_Input VS(VS_Input input)
+{
+    PS_Input output;
+
+    output.Position = mul(ViewProjection, input.Position);
+
+    return output;
+}
+
+float4 PS(PS_Input input) : SV_Target0
+{
+    return Color;
+}
+
+#effect[VS=VS, PS=PS]