Fixed up setup process, cleaned up repo, and updated README

setup.py

@@ -1,7 +1,40 @@
 #!/usr/bin/env python
+try:
+    from Cython.Build import cythonize
+    import Cython
+except ImportError:
+    raise RuntimeError('No cython installed. Please run `pip install cython`')
+
+if Cython.__version__ < '0.19.1':
+    raise RuntimeError('Old cython installed. Please run `pip install -U cython`')
+
 from distutils.core import setup
-from Cython.Build import cythonize
+
+MAJOR = 0
+MINOR = 1
+MICRO = 0
+VERSION = '%d.%d.%d' % (MAJOR, MINOR, MICRO)
+
+
+def write_version_py(filename=None):
+    cnt = """\
+version = '%s'
+short_version = '%s'
+"""
+    if not filename:
+        filename = os.path.join(
+            os.path.dirname(__file__), 'capnp', 'version.py')
+
+    a = open(filename, 'w')
+    try:
+        a.write(cnt % (VERSION, VERSION))
+    finally:
+        a.close()
+
 setup(
-    name = "capnp",
-    ext_modules = cythonize('*.pyx'),
+    name="capnp",
+    version=VERSION,
+    packages=["capnp"],
+    package_data={'capnp': ['*.pxd']},
+    ext_modules=cythonize('capnp/*.pyx')
 )