usb1: Use versioneer.

Author: vpelletier

.gitattributes

@@ -0,0 +1 @@
+usb1/_version.py export-subst

MANIFEST.in

@@ -5,3 +5,5 @@ include examples/README
 include examples/*.py
 include testUSB1.py
 include stdeb.cfg
+include versioneer.py
+include usb1/_version.py

setup.py

@@ -17,6 +17,7 @@
 from codecs import open
 import os
 import sys
+import versioneer
 
 long_description = open(
     os.path.join(os.path.dirname(__file__), 'README.rst'),
@@ -34,7 +35,8 @@
     description=next(x for x in long_description.splitlines() if x.strip()),
     long_description='.. contents::\n\n' + long_description,
     keywords='usb libusb',
-    version='1.7',
+    version=versioneer.get_version(),
+    cmdclass=versioneer.get_cmdclass(),
     author='Vincent Pelletier',
     author_email='plr.vincent@gmail.com',
     url='http://github.com/vpelletier/python-libusb1',

usb1/__init__.py

@@ -2714,3 +2714,7 @@ def __init__(self):
             DeprecationWarning,
         )
         super(LibUSBContext, self).__init__()
+
+from ._version import get_versions
+__version__ = get_versions()['version']
+del get_versions