[build] Rename gPXE to iPXE

Access to the gpxe.org and etherboot.org domains and associated
resources has been revoked by the registrant of the domain.  Work
around this problem by renaming project from gPXE to iPXE, and
updating URLs to match.

Also update README, LOG and COPYRIGHTS to remove obsolete information.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/efi/PiDxe.h

@@ -0,0 +1,25 @@
+/** @file
+
+  Root include file for Mde Package DXE_CORE, DXE, SMM, SAL type modules.
+
+Copyright (c) 2006 - 2007, Intel Corporation
+All rights reserved. This program and the accompanying materials
+are licensed and made available under the terms and conditions of the BSD License
+which accompanies this distribution.  The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __PI_DXE_H__
+#define __PI_DXE_H__
+
+#include <ipxe/efi/Uefi/UefiBaseType.h>
+#include <ipxe/efi/Uefi/UefiSpec.h>
+
+#include <ipxe/efi/Pi/PiDxeCis.h>
+
+#endif
+