Add meta data

setup.py

@@ -53,10 +53,19 @@ setup(name="nifty7",
           "Bug Tracker": "https://gitlab.mpcdf.mpg.de/ift/nifty/issues",
           "Documentation": "https://ift.pages.mpcdf.de/nifty/",
           "Source Code": "https://gitlab.mpcdf.mpg.de/ift/nifty",
+          "Changelog": "https://gitlab.mpcdf.mpg.de/ift/nifty/-/blob/NIFTy_7/ChangeLog",
       },
       packages=find_packages(include=["nifty7", "nifty7.*"]),
       license="GPLv3",
       setup_requires=['scipy>=1.4.1', 'numpy>=1.17'],
       install_requires=['scipy>=1.4.1', 'numpy>=1.17'],
       python_requires='>=3.6',
+      classifiers=[
+          "Development Status :: 5 - Production/Stable",
+          "Topic :: Scientific/Engineering :: Mathematics",
+          "Topic :: Scientific/Engineering :: Physics",
+          "License :: OSI Approved :: GNU General Public License v3 (GPLv3)",
+          "Operating System :: OS Independent",
+          "Programming Language :: Python",
+          "Intended Audience :: Science/Research"],
       )