Move shaders into glsl and hlsl directories

Move `data/shaders` to `data/shaders/glsl`
Move `data/hlsl` to `data/shaders/hlsl`

Fix up shader paths in the cpp files to point to the new glsl location.

`data/shaders/hlsl/compile.py` still overwrites the glsl .spv files (for
now).

Issue: #723

data/shaders/glsl/pipelinestatistics/scene.tese

@@ -0,0 +1,24 @@
+#version 450
+
+layout (triangles) in;
+
+layout (location = 0) in vec3 inNormal[];
+layout (location = 1) in vec3 inColor[];
+layout (location = 2) in vec3 inViewVec[];
+layout (location = 3) in vec3 inLightVec[];
+
+layout (location = 0) out vec3 outNormal;
+layout (location = 1) out vec3 outColor;
+layout (location = 2) out vec3 outViewVec;
+layout (location = 3) out vec3 outLightVec;
+
+void main(void)
+{
+    gl_Position = (gl_TessCoord.x * gl_in[2].gl_Position) +
+                  (gl_TessCoord.y * gl_in[1].gl_Position) +
+                  (gl_TessCoord.z * gl_in[0].gl_Position);
+	outNormal = gl_TessCoord.x*inNormal[2] + gl_TessCoord.y*inNormal[1] + gl_TessCoord.z*inNormal[0];
+	outViewVec = gl_TessCoord.x*inViewVec[2] + gl_TessCoord.y*inViewVec[1] + gl_TessCoord.z*inViewVec[0];
+	outLightVec = gl_TessCoord.x*inLightVec[2] + gl_TessCoord.y*inLightVec[1] + gl_TessCoord.z*inLightVec[0];
+	outColor = inColor[0];
+}