Use scm version for package

Author: tomalrussell

setup.py

@@ -18,7 +18,7 @@ def readme():
 
 setup(
     name='snkit',
-    version='0.1.2',
+    use_scm_version=True,
     license='MIT License',
     description='a spatial networks toolkit',
     long_description=readme(),
@@ -44,6 +44,9 @@ def readme():
     keywords=[
         # eg: 'keyword1', 'keyword2', 'keyword3',
     ],
+    setup_requires=[
+        'setuptools_scm'
+    ],
     install_requires=[
         # eg: 'aspectlib==1.1.1', 'six>=1.7',
         'fiona>=1.7.13',