add module __init__ files for backend

setup.py

@@ -1,14 +1,36 @@
 from setuptools import setup, find_packages
+from setuptools.command.develop import develop
+from setuptools.command.install import install
+
+class PostDevelopCommand(develop):
+    """Post-installation for development mode."""
+    def run(self):
+        develop.run(self)
+        print('Will now try loading a module (develop)')
+        import ldm.generate
+        print('ldm.generate loaded ok')
+
+class PostInstallCommand(install):
+    """Post-installation for installation mode."""
+    def run(self):
+        install.run(self)
+        print('Will now try loading a module (install)')
+        import ldm.generate
+        print('ldm.generate loaded ok')
 
 setup(
     name='invoke-ai',
     version='2.1.4',
-    description='InvokeAI text to image generation toolkit',
+    description='InvokeAI: A Stable Diffusion text to image generation toolkit',
     packages=find_packages(),
     install_requires=[
         'torch',
         'numpy',
         'tqdm',
     ],
+    cmdclass={
+        'develop': PostDevelopCommand,
+        'install': PostInstallCommand,
+    },
 )