New setup script.

setup.py

@@ -1,31 +1,61 @@
 # setup.py
 
-from setuptools import setup, find_packages
+from setuptools import setup, find_packages, Extension
+
+try:
+    from Cython.Distutils import build_ext
+    HAVE_CYTHON = True
+except ImportError:
+    from setuptools.command.build_ext import build_ext
+    HAVE_CYTHON = False
+
+
+def readme():
+    with open('README.rst') as readme_file:
+        return readme_file.read()
+
+REQUIRES = [
+    'docopt >= 0.6.2',
+    'graphviz >= 0.5.2'
+]
+
+EXTENSIONS = []
+
+if HAVE_CYTHON:
+    EXTENSIONS.append(Extension('nmrstarlib.cbmrblex',
+                                sources=['nmrstarlib/cbmrblex.pyx']))
+else:
+    EXTENSIONS.append(Extension('nmrstarlib.cbmrblex',
+                                sources=['nmrstarlib/cbmrblex.c']))
 
 setup(
     name='nmrstarlib',
-    version='1.0.4',
+    version='1.0.5',
     author='Andrey Smelter',
     author_email='andrey.smelter@gmail.com',
     description='Python library for parsing data from NMR-STAR format files',
     keywords='BMRB NMR-STAR parsing nmrstarlib',
     license='MIT',
     url='https://github.com/MoseleyBioinformaticsLab/nmrstarlib',
     packages=find_packages(),
-    package_data={'nmrstarlib':['conf/*.json']},
+    package_data={'nmrstarlib': ['conf/*.json']},
     platforms='any',
-    long_description=open('README.rst').read(),
+    long_description=readme(),
+    install_requires=REQUIRES,
+    cmdclass={"build_ext": build_ext},
+    ext_modules=EXTENSIONS,
     classifiers=[
         'Development Status :: 4 - Beta',
         'Environment :: Console',
         'Intended Audience :: Developers',
         'Intended Audience :: Science/Research',
         'License :: OSI Approved :: MIT License',
         'Operating System :: OS Independent',
-        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 2.7',
         'Programming Language :: Python :: 3.4',
         'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
         'Topic :: Scientific/Engineering :: Bio-Informatics',
         'Topic :: Software Development :: Libraries :: Python Modules',
     ],
-)
+)