**/Makefile.kmk: Cosmetic changes.
Makefiles: The PATH_<target> variable is deprated, use <target>_0_OUTDIR instead.
Automated rebranding to Oracle copyright/license strings via filemuncher
Additions/Makefiles: Pushed them up to root (sub-makefile wise). Some cleanups, opengl omitted.
Makefiles: VBOX_KBUILD_HACKING -> VBOX_SINGLE_MAKEFILE
made Qt4 the default GUI; VBOX_VRDP => VBOX_WITH_VRDP; VBOX_HGCM => VBOX_WITH_HGCM; Makefile cleanup
VBOX_KBUILD_HACKING.
PATH_KBUILD -> KBUILD_PATH.
BUILD_PLATFORM* -> KBUILD_HOST*.
The Big Sun Rebranding Header Change
Additions/FreeBSD: Makefile fix
export, properties, correct headers, correct header blocker, correct #endif comment.