Update PyPI metadata files: add setup.cfg etc (#164)

Update to the newer PyPI / python packaging metadata file structure.

A lot of this was cribbed from how [`Flask`](https://github.com/pallets/flask) itself
exposes its metadata.

Author: jeffwidman

pyproject.toml

@@ -0,0 +1,6 @@
+[build-system]
+requires = [
+    "setuptools>=42",
+    "wheel"
+]
+build-backend = "setuptools.build_meta"

setup.cfg

@@ -1,2 +1,35 @@
-[bdist_wheel]
-universal=1
+[metadata]
+name = Flask-DebugToolbar
+version = 0.12.dev0
+author = Michael van Tellingen
+author_email = michaelvantellingen@gmail.com
+maintainer = Matt Good
+maintainer_email = matt@matt-good.net
+description = A toolbar overlay for debugging Flask applications.
+long_description = file: README.rst
+long_description_content_type = text/x-rst
+keywords = flask, debug, toolbar
+url = https://github.com/flask-debugtoolbar/flask-debugtoolbar
+project_urls =
+    Changelog = https://github.com/jeffwidman/cqlsh#changelog
+    Documentation = https://github.com/flask-debugtoolbar/flask-debugtoolbar/blob/master/CHANGES.rst
+classifiers =
+    Development Status :: 4 - Beta
+    Environment :: Web Environment
+    Framework :: Flask
+    Intended Audience :: Developers
+    License :: OSI Approved :: BSD License
+    Operating System :: OS Independent
+    Programming Language :: Python
+    Topic :: Internet :: WWW/HTTP :: Dynamic Content
+    Topic :: Software Development :: Libraries :: Python Modules
+
+[options]
+packages = find:
+package_dir = = flask_debugtoolbar
+include_package_data = True
+python_requires = >=2.7
+# Dependencies are in setup.py for GitHub's dependency graph.
+
+[options.packages.find]
+where = flask_debugtoolbar

setup.py

@@ -1,49 +1,12 @@
-import os
 from setuptools import setup
 
-
-here = os.path.abspath(os.path.dirname(__file__))
-
-try:
-    README = open(os.path.join(here, 'README.rst')).read()
-    CHANGES = open(os.path.join(here, 'CHANGES.rst')).read()
-except Exception:
-    README = ''
-    CHANGES = ''
-
-
+# Metadata goes in setup.cfg. These are here for GitHub's dependency graph.
 setup(
-    name='Flask-DebugToolbar',
-    version='0.12.dev0',
-    url='https://flask-debugtoolbar.readthedocs.io/',
-    license='BSD',
-    author='Michael van Tellingen',
-    author_email='michaelvantellingen@gmail.com',
-    maintainer='Matt Good',
-    maintainer_email='matt@matt-good.net',
-    description='A toolbar overlay for debugging Flask applications.',
-    long_description=README + '\n\n' + CHANGES,
-    zip_safe=False,
-    platforms='any',
-    include_package_data=True,
-    packages=[
-        'flask_debugtoolbar',
-        'flask_debugtoolbar.panels'
-    ],
+    name="Flask-DebugToolbar",
     install_requires=[
         'Flask>=0.8',
         'Blinker',
         'itsdangerous',
         'werkzeug',
     ],
-    classifiers=[
-        'Development Status :: 4 - Beta',
-        'Environment :: Web Environment',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: BSD License',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
-        'Topic :: Software Development :: Libraries :: Python Modules'
-    ]
 )