fix setup bug and provide rdkit example

py3Dmol/py3Dmol/__init__.py

@@ -62,4 +62,6 @@ class view(object):
             cmd = cmd.rstrip(',')
             cmd += ');\n';
             self.startjs += cmd
+            return self
+            
         return makejs

py3Dmol/setup.py

@@ -23,7 +23,7 @@ setup(
     # Versions should comply with PEP440.  For a discussion on single-sourcing
     # the version across setup.py and the project code, see
     # https://packaging.python.org/en/latest/single_source_version.html
-    version='0.5.1',
+    version='0.5.2',
 
     description='An IPython interface for embedding 3Dmol.js views',
     long_description=long_description,
@@ -68,7 +68,7 @@ setup(
 
     # You can just specify the packages manually here if your project is
     # simple. Or you can use find_packages().
-    packages=find_packages(exclude=['py3Dmol']),
+    packages=find_packages(),
 
     # Alternatively, if you want to distribute just a my_module.py, uncomment
     # this: