Added missing classifiers to the `setup.py`

I have added extra topics:

```
+        'Topic :: Software Development :: Libraries :: Python Modules',
+        'Topic :: Internet :: WWW/HTTP',
+        'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
```

Added information about framework:

```
'Framework :: Django',
'Framework :: Django :: 1.6',
'Framework :: Django :: 1.7',
'Framework :: Django :: 1.8',
'Framework :: Django :: 1.9',
```

And `python` versions:

```
        'Programming Language :: Python :: 2.7',
        ...
        'Programming Language :: Python :: 3.4',
        'Programming Language :: Python :: 3.5',
        'Programming Language :: Python :: Implementation :: PyPy',
```

I have also sorted the classifiers alphabetically.

setup.py

@@ -23,13 +23,25 @@ setup(
     install_requires=install_requires,
     include_package_data=True,
     classifiers=[
+        'Development Status :: 5 - Production/Stable',
         'Environment :: Web Environment',
+        'Framework :: Django',
+        'Framework :: Django :: 1.6',
+        'Framework :: Django :: 1.7',
+        'Framework :: Django :: 1.8',
+        'Framework :: Django :: 1.9',
         'Intended Audience :: Developers',
-        'Development Status :: 5 - Production/Stable',
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
+        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.4',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: Implementation :: PyPy',
         'Topic :: Utilities',
+        'Topic :: Software Development :: Libraries :: Python Modules',
+        'Topic :: Internet :: WWW/HTTP',
+        'Topic :: Internet :: WWW/HTTP :: Dynamic Content',
     ]
 )