Switch to pbr for less boilerplate

Begins removes lots of argparse boilerplate; pbr removes lots of
setup.py boilerplate.

setup.cfg

@@ -0,0 +1,29 @@
+[metadata]
+name = begins
+author = Aaron Iles
+author-email = [email protected]
+summary = Command line programs for busy developers
+description-file = README.rst
+home-page = http://begins.readthedocs.org
+license = ASL
+classifier =
+        Development Status :: 4 - Beta
+        Intended Audience :: Developers
+        License :: OSI Approved :: Apache Software License
+        Operating System :: MacOS :: MacOS X
+        Operating System :: POSIX :: Linux
+        Programming Language :: Python :: 2
+        Programming Language :: Python :: 2.6
+        Programming Language :: Python :: 2.7
+        Programming Language :: Python :: 3
+        Programming Language :: Python :: 3.2
+        Programming Language :: Python :: 3.3
+        Programming Language :: Python :: 3.4
+        Programming Language :: Python :: Implementation :: CPython
+        Programming Language :: Python :: Implementation :: PyPy
+        Topic :: Software Development :: Libraries :: Python Module
+[backwards_compat]
+zip_safe = false
+[files]
+packages =
+    begins

setup.py

@@ -3,52 +3,11 @@
 import re
 import sys
 
-
-def load_version(filename='begin/version.py'):
-    "Parse a __version__ number from a source file"
-    with open(filename) as source:
-        text = source.read()
-        match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", text)
-        if not match:
-            msg = "Unable to find version number in {}".format(filename)
-            raise RuntimeError(msg)
-        version = match.group(1)
-        return version
-
 PYTHON3K = sys.version_info[0] > 2
 
-requires = ['funcsigs'] if sys.version_info[:2] < (3, 3) else []
-requires += ['argparse'] if sys.version_info[:2] < (2, 7) else []
-
 setup(
-    name="begins",
-    version=load_version(),
-    packages=['begin'],
-    zip_safe=False,
-    author="Aaron Iles",
-    author_email="[email protected]",
-    url="http://begins.readthedocs.org",
-    description="Command line programs for busy developers",
-    long_description=open('README.rst').read(),
-    license="ASL",
-    classifiers = [
-        'Development Status :: 4 - Beta',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: Apache Software License',
-        'Operating System :: MacOS :: MacOS X',
-        'Operating System :: POSIX :: Linux',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.6',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
-        'Programming Language :: Python :: 3.4',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy',
-        'Topic :: Software Development :: Libraries :: Python Modules'
-    ],
-    install_requires=requires,
+    setup_requires=['pbr'],
+    pbr=True,
     tests_require=['mock'] + ([] if PYTHON3K else ['unittest2']),
     test_suite="tests" if PYTHON3K else "unittest2.collector"
 )