Increase version number, to 2.8, and bump nettle library major number to 5.

ChangeLog

 2013-04-25  Niels Möller  <nisse@lysator.liu.se>
 
+	* configure.ac: Changed version number, to 2.8.
+	(LIBNETTLE_MAJOR): Bumped major number, following
+	nettle_memxor ABI break.
+	(LIBNETTLE_MINOR): Reset to zero.
+
 	* examples/hogweed-benchmark.c: Add benchmarking of OpenSSL's RSA
 	functions.
 	(all functions): Deleted unneeded casts.

configure.ac

@@ -2,7 +2,7 @@ dnl -*- mode: shell-script; sh-indentation: 2; -*-
 
 dnl Process this file with autoconf to produce a configure script.
 
-AC_INIT([nettle], [2.7], [nettle-bugs@lists.lysator.liu.se])
+AC_INIT([nettle], [2.8], [nettle-bugs@lists.lysator.liu.se])
 AC_PREREQ(2.61)
 AC_CONFIG_SRCDIR([arcfour.c])
 # Needed to stop autoconf from looking for files in parent directories.
@@ -10,8 +10,8 @@ AC_CONFIG_AUX_DIR([.])
 
 AC_CONFIG_HEADER([config.h])
 
-LIBNETTLE_MAJOR=4
-LIBNETTLE_MINOR=6
+LIBNETTLE_MAJOR=5
+LIBNETTLE_MINOR=0
 
 LIBHOGWEED_MAJOR=2
 LIBHOGWEED_MINOR=4