Add more credits to README. Tidy up.

README

@@ -196,7 +196,6 @@ See the ChangeLog files for details.
 
 3.0.11 Apr-11-12
         Lots of build fixes.
-	Add Amiga newer MacOS support.
 	Add support for variadic functions (ffi_prep_cif_var).
 	Add Linux/x32 support.
 	Add thiscall, fastcall and MSVC cdecl support on Windows.
@@ -348,7 +347,7 @@ See the ChangeLog files for details.
 Authors & Credits
 =================
 
-libffi was originally written by Anthony Green <green@redhat.com>.
+libffi was originally written by Anthony Green <green@moxielogic.com>.
 
 The developers of the GNU Compiler Collection project have made
 innumerable valuable contributions.  See the ChangeLog file for
@@ -372,10 +371,12 @@ frv		Anthony Green
 ia64		Hans Boehm
 m32r		Kazuhiro Inaoka
 m68k		Andreas Schwab
+m88k		Miod Vallat
 microblaze	Nathan Rossi
 mips		Anthony Green, Casey Marshall
 mips64		David Daney
 moxie		Anthony Green
+nios ii		Sandra Loosemore
 pa		Randolph Chung, Dave Anglin, Andreas Tobler
 powerpc		Geoffrey Keating, Andreas Tobler, 
 			 David Edelsohn, John Hornkvist
@@ -385,6 +386,7 @@ sh		Kaz Kojima
 sh64		Kaz Kojima
 sparc		Anthony Green, Gordon Irlam
 tile-gx/tilepro Walter Lee
+vax		Miod Vallat
 x86		Anthony Green, Jon Beniston
 x86-64		Bo Thorsen
 xtensa		Chris Zankel