start getting declarative with setup.cfg

dependencies.txt

@@ -1,4 +0,0 @@
-pEpPythonAdapter    => Python 3
-                    => g++ | clang | CL.EXE
-                    -> boost::python
-                    -> pEpEngine

setup.cfg

@@ -0,0 +1,23 @@
+[metadata]
+name = pEp
+version = 2.1.0-RC2
+url = https://pep.foundation
+author = Volker Birk
+author_email = vb@pep-project.org
+maintainer = Matthias Heckmann
+maintainer_email = heck@pep.foundation
+description = p≡p for Python
+long_description = file: README.md
+keywords = pEp, crypto, end-to-end, python adapter, key management, high-level
+license = GNU Affero General Public License
+license_files = LICENSE
+classifiers =
+    Intended Audience :: Developers
+    Topic :: Utilities
+    License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
+    Natural Language :: English
+    Operating System :: OS Independent
+    Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
+    Programming Language :: Python :: 3.8
+    Development Status :: 3 - Alpha