Make installable

This would be so that other packages can derive from the spec and so reuse
the built-in functionality

Author: Martin Durant

requirements.txt

@@ -0,0 +1,12 @@
+[bdist_wheel]
+universal: 1
+
+[metadata]
+long_description: file: README.rst
+
+[versioneer]
+VCS = git
+style = pep440
+versionfile_source = fsspec/_version.py
+versionfile_build = fsspec/_version.py
+tag_prefix = ""

setup.cfg

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+
+from setuptools import setup
+import versioneer
+
+setup(name='fsspec',
+      version=versioneer.get_version(),
+      cmdclass=versioneer.get_cmdclass(),
+      classifiers=[
+            'Development Status :: 4 - Beta',
+            'Intended Audience :: Developers',
+            'License :: OSI Approved :: BSD License',
+            'Operating System :: OS Independent',
+            'Programming Language :: Python :: 2.7',
+            'Programming Language :: Python :: 3.5',
+            'Programming Language :: Python :: 3.6',
+      ],
+      description='File-system specification',
+      url='http://github.com/martindurant/filesystem_spec',
+      maintainer='Martin Durant',
+      maintainer_email='[email protected]',
+      license='BSD',
+      keywords='file',
+      packages=['fsspec'],
+      python_requires='>= 2.7, != 3.0.*, != 3.1.*, != 3.2.*, != 3.3.*, != 3.4.*',
+      install_requires=[open('requirements.txt').read().strip().split('\n')],
+      zip_safe=False)