Define version_info to be a tuple (major, minor, micro, level); level is a string "a2", "b1", "c1", or '' for a final release.
Define version_info to be a tuple (major, minor, micro, level); level
is a string "a2", "b1", "c1", or '' for a final release.

Added version_info and hexversion to the module docstring.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator