Added AC_PATH_HEADER and AC_PATH_LIBRARY
Better header/library detection. Now works if things are already in
the include/library path
Look for the wine/MFC headers and libraries in more places so that it
works out of the box if Wine/MFC is installed in a standard place
(although there is not really a standard place yet for the MFC)
Renamed the '--with-xxx' options to have simpler more natural names
Renamed the corresponding 'WINELIB_xxx' variables to 'WINE_xxx'