Implemented logic in KRPipeline to update descriptor sets.

Implemented KRTexture::getFullImageView
Implemented KRTexture::getImage
Create stub function, KRUniformBuffer::getBuffer

kraken/KRTexture.h

@@ -89,6 +89,9 @@ public:
 
   void _swapHandles();
 
+  VkImageView getFullImageView(KrDeviceHandle device);
+  VkImage getImage(KrDeviceHandle device);
+
 protected:
   virtual bool createGPUTexture(int lod_max_dim) = 0;
   GLuint getHandle();