it can't be imported from wx.build.config since wx._core doesn't
exist. It is still copied down to wx/build for the install though.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26345 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
standard install.
Moved the bulk of setup.py to wx/build/config.py so 3rd party modules
that wish to use the same setup/configuration code can do so simply by
importing this module form their own setup.py scripts.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26341 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
