[svn r3588] Make that __future__ addition conditional on Python 2.3
[svn r3588] Make that __future__ addition conditional on Python 2.3

dstufft/virtualenv,madprog/virtualenv,Seha16/virtualenv,RAS-ViVa/virtualenv,davidszotten/virtualenv,francatore/virtualenv,Ivoz/virtualenv,Lyleo/virtualenv,francatore/virtualenv,techtonik/virtualenv,haridsv/virtualenv,msabramo/virtualenv,Seha16/virtualenv,madprog/virtualenv,blueyed/virtualenv,bigplus/virtualenv,Ivoz/virtualenv,ionelmc/virtualenv,haridsv/virtualenv,kissthink/virtualenv,mykemunson/virtualenv,jedie/virtualenv,techtonik/virtualenv,kissthink/virtualenv,ionelmc/virtualenv,jedie/virtualenv,vvtam/virtualenv,ionelmc/virtualenv,mykemunson/virtualenv,msabramo/virtualenv,vvtam/virtualenv,RAS-ViVa/virtualenv,msabramo/virtualenv,dstufft/virtualenv,davidszotten/virtualenv,bigplus/virtualenv,blueyed/virtualenv,Lyleo/virtualenv