Update setup.py

Author: DocMT

setup.py

@@ -11,7 +11,7 @@
       author='Abel Heinsbroek',
       author_email='abel.heinsbroek@vitens.nl',
       license='Apache Licence 2.0',
-      packages=find_packages(),
+      packages=['phreeqpython', 'phreeqpython.lib', 'phreeqpython.database'],
       include_package_data=True,
       zip_safe=False,
       install_requires=['periodictable','numpy','scipy']