Move all the default build output locations to be under the main build folder

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73581 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Switch setup.py to use build.py for the actual building,
and set things up so commands like install or bdist_egg are
able to use the build as-is without having to build it.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73582 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Monkey-patch the distutils copy_file and copy_tree functions so they preserve symlinks.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73583 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Also copy the generated .py and .pi files into the sdist

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73584 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
AGW on Phoenix: add `__lt__` and `__gt__` methods to the `FixedPoint` class in `FloatSpin`, as Python 3 is funnier than I thought.

git-svn-id: http://svn.wxwidgets.org/svn/wx/wxPython@73586 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775