added texture. looks like copying the one from the compute output isn't going to totally work out of the box

src/main.rs

@@ -74,7 +74,7 @@ fn main() {
     let mut processor = vkprocessor::VkProcessor::new(&instance, &surface);
 
     processor.compile_kernel(String::from("simple-edge.compute"));
-    processor.compile_shaders(String::from("simple"), &surface);
+    processor.compile_shaders(String::from("simple_texture"), &surface);
 
     processor.load_buffers(String::from("funky-bird.jpg"));