Add missing imports

Author: guilhermebene

spas/__init__.py

@@ -9,4 +9,6 @@
 from .reconstruction import *
 from .visualization import *
 from .noise import *
-from .reconstruction_nn import *
+from .reconstruction_nn import *
+from .convert_spec_to_rgb import *
+from .plot_spec_to_rgb_image import *