Merge pull request #692 from kmike/version_info_fix

fix scrapy.version_info when SCRAPY_VERSION_FROM_GIT is set

scrapy/__init__.py

@@ -6,7 +6,8 @@ import pkgutil
 __version__ = pkgutil.get_data(__package__, 'VERSION').strip()
 if not isinstance(__version__, str):
     __version__ = __version__.decode('ascii')
-version_info = tuple(int(v) for v in __version__.split('.')[:3])
+version_info = tuple(int(v) if v.isdigit() else v
+                     for v in __version__.split('.'))
 
 import sys, os, warnings