Feature/mbedtls (#84)

* try to import mbedtls and build it

* add stubs socket class

* some boilterplate, read and write function implemented

* more boilterplate / current error in handshake because no CA cert is setup

* add something so skip ca verification, can ws curl https://google.com !

* cleanup / close implemented

* tweak CMakefiles

* typo in include

* update readme

* disable unittests

third_party/mbedtls/crypto/programs/wince_main.c

@@ -0,0 +1,45 @@
+/*
+ *  Windows CE console application entry point
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ */
+
+#if defined(_WIN32_WCE)
+
+#include <windows.h>
+
+extern int main( int, const char ** );
+
+int _tmain( int argc, _TCHAR* targv[] )
+{
+    char **argv;
+    int i;
+
+    argv = ( char ** ) calloc( argc, sizeof( char * ) );
+
+    for ( i = 0; i < argc; i++ ) {
+        size_t len;
+        len = _tcslen( targv[i] ) + 1;
+        argv[i] = ( char * ) calloc( len, sizeof( char ) );
+        wcstombs( argv[i], targv[i], len );
+    }
+
+    return main( argc, argv );
+}
+
+#endif  /* defined(_WIN32_WCE) */