Pulled the gui out into VkGUI to separate it out.

vk_types.h

@@ -37,3 +37,20 @@ struct AllocatedImage {
   VkExtent3D imageExtent;
   VkFormat imageFormat;
 };
+
+struct ComputePushConstants {
+  glm::vec4 data1;
+  glm::vec4 data2;
+  glm::vec4 data3;
+  glm::vec4 data4;
+};
+
+struct ComputeEffect {
+  const char *name;
+  VkPipeline pipeline;
+  VkPipelineLayout layout;
+
+  ComputePushConstants data;
+};
+
+constexpr unsigned int FRAME_OVERLAP=2;