fix the package description on PyPI

Author: Naomi Slater

setup.py

@@ -53,8 +53,9 @@ def read(path):
     author='CRATE Technology GmbH',
     author_email='office@crate.io',
     package_dir={'': 'src'},
-    description='Crate Data Python client',
+    description='CrateDB Python Client',
     long_description=long_description,
+    long_description_content_type='text/x-rst',
     platforms=['any'],
     license='Apache License 2.0',
     keywords='crate db api sqlalchemy',