sets ``egg_info`` options such that they produce an identical version number
to the source distribution's version number.  (Previously, the default
version number could be different due to the use of ``--tag-date``, or if
the version was overridden on the command line that built the source
distribution.)

(backport from trunk)

--HG--
branch : setuptools-0.6
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/branches/setuptools-0.6%4050703