aligned preprocessor switches acros configurations
added uuid.h to installed header files list, and added SCRIPTSUPPORT to the autoconf configure.ac file
additional header to be installed for *nix to export the uuid functions
passing the SCRIPTSUPPORT directive on to the IXML makefile
reverted the uuid functions export, too complicated to export them properly in the upnp.so file.
renamed SCRIPSUPPORT to IXML_HAVE_SCRIPTSUPPORT for consistency. Changed default to scriptsupport being enabled.
updated VS solution and project with renamed IXML_HAVE_SCRIPTSUPPORT
Removed C++ comment
Update build/inc/autoconfig.h