Modernized setup.py

Provided actually useful metadata and switched to setuptools (which is everywhere these days).

Author: agronholm

setup.py

@@ -1,24 +1,23 @@
-from distutils.core import setup
-
-packages=[
-    'xbee',
-    'xbee.tests',
-    'xbee.helpers',
-    'xbee.helpers.dispatch',
-    'xbee.helpers.dispatch.tests',
-]
+from setuptools import setup, find_packages
 
 setup(
     name='XBee',
     version='2.2.3',
-    author='Paul Malmsten',
-    author_email='pmalmsten@gmail.com',
-    packages=packages,
-    scripts=[],
-    url='https://github.com/nioinnovation/python-xbee',
-    license='LICENSE.txt',
     description='Python tools for working with XBee radios',
     long_description=open('README.rst').read(),
-    requires=['serial'],
-    provides=packages,
+    url='https://github.com/nioinnovation/python-xbee',
+    author='Paul Malmsten',
+    author_email='pmalmsten@gmail.com',
+    license='MIT',
+    classifiers=[
+        'Development Status :: 5 - Production/Stable',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: MIT License',
+        'Topic :: Terminals :: Serial',
+        'Programming Language :: Python',
+        'Programming Language :: Python :: 2'
+        'Programming Language :: Python :: 3'
+    ],
+    packages=find_packages(exclude=['tests', '*.tests']),
+    install_requires=['pyserial']
 )