Rewrote configure --enable/with options handling:

Rewrote configure --enable/with options handling:

1. There is no more need to set DEFAULT_wxUSE_XXX for all options (although
   it's still taken into account if it is set), use WX_ARG_DISABLE/WITHOUT for
   the options which are enabled by default instead (and WX_ARG_ENABLE/WITH
   for those which are disabled): this makes configure messages more
   understandable (this closes bug 1038676)
2. Added --disable-all-features option which allows to disable everything
   which can be disabled at once in order to build the absolutely minimal
   wx library
3. General cleanup

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47339 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775