cleanup library and some basic tests. Includes, add guards to includes
diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 4b54187..961f4dc 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -39,6 +39,8 @@
 #include "polarssl/debug.h"
 #include "polarssl/ssl.h"
 
+#include <string.h>
+
 #if defined(POLARSSL_X509_CRT_PARSE_C) && \
     defined(POLARSSL_X509_CHECK_EXTENDED_KEY_USAGE)
 #include "polarssl/oid.h"
@@ -47,12 +49,11 @@
 #if defined(POLARSSL_PLATFORM_C)
 #include "polarssl/platform.h"
 #else
+#include <stdlib.h>
 #define polarssl_malloc     malloc
 #define polarssl_free       free
 #endif
 
-#include <stdlib.h>
-
 #if defined(_MSC_VER) && !defined strcasecmp && !defined(EFIX64) && \
     !defined(EFI32)
 #define strcasecmp _stricmp