add initial CMake and Visual Studio build support

This moves the compatibility include files from include to
include/compat so we can use the awful MS C compiler
<../include/> trick to emulate the GNU #include_next extension.

This also removes a few old compat files we do not need anymore.

patches/openssl.c.patch

@@ -1,10 +1,11 @@
---- apps/openssl.c.orig	2015-06-05 03:42:12.956112944 -0500
-+++ apps/openssl.c	2015-06-05 03:41:54.215381908 -0500
-@@ -130,6 +130,18 @@
+--- apps/openssl.c.orig	2015-07-20 02:01:42.000000000 -0600
++++ apps/openssl.c	2015-07-20 02:02:00.000000000 -0600
+@@ -130,6 +130,19 @@
  #include <openssl/engine.h>
  #endif
- 
+
 +#ifdef _WIN32
++#include <io.h>
 +#include <fcntl.h>
 +static void set_stdio_binary(void)
 +{
@@ -18,12 +19,22 @@
 +
  #include "progs.h"
  #include "s_apps.h"
- 
-@@ -216,6 +228,7 @@
+
+@@ -204,7 +216,9 @@
+ static void
+ openssl_startup(void)
+ {
++#ifndef _WIN32
+ 	signal(SIGPIPE, SIG_IGN);
++#endif
+
+ 	CRYPTO_malloc_init();
+ 	OpenSSL_add_all_algorithms();
+@@ -216,6 +230,7 @@
  #endif
- 
+
  	setup_ui_method();
 +	set_stdio_binary();
  }
- 
+
  static void