BLD: Adds versioneer

versioneer let's us track the version using git tags. This prevents
issues like the 0.8.2->0.8.3 push. This also puts the number of commits
from the release and the commit you are on in the version.

.gitattributes

@@ -0,0 +1 @@
+zipline/_version.py export-subst

MANIFEST.in

@@ -4,3 +4,5 @@ include LICENSE
 include etc/requirements*.txt
 recursive-include zipline/resources *.*
 recursive-include zipline *.pyx
+include versioneer.py
+include zipline/_version.py

setup.cfg

@@ -5,4 +5,15 @@ with-ignore-docstrings=1
 with-timer=1
 
 [metadata]
-description-file = README.md
+description-file = README.rst
+
+# See the docstring in versioneer.py for instructions. Note that you must
+# re-run 'versioneer.py setup' after changing this section, and commit the
+# resulting files.
+[versioneer]
+VCS=git
+style=pep440
+versionfile_source=zipline/_version.py
+versionfile_build=zipline/_version.py
+tag_prefix=
+parentdir_prefix= zipline-

setup.py

@@ -30,6 +30,8 @@
     setup,
 )
 
+import versioneer
+
 
 class LazyCythonizingList(list):
     cythonized = False
@@ -219,7 +221,8 @@ def pre_setup():
 
 setup(
     name='zipline',
-    version='0.8.3',
+    version=versioneer.get_version(),
+    cmdclass=versioneer.get_cmdclass(),
     description='A backtester for financial algorithms.',
     author='Quantopian Inc.',
     author_email='[email protected]',