Fix issue #20: type cast in send(), add WSAStartup, and add CRTSECURE_NO_WARNINGS for MSVC2013.

easywsclient.cpp

@@ -1,6 +1,8 @@
 #include "easywsclient.hpp"
 
 #ifdef _WIN32
+    // CRTSECURE_NO_WARNINGS for sscanf errors in MSVC2013 Express
+    #define CRTSECURE_NO_WARNINGS
     #ifndef WIN32_LEAN_AND_MEAN
         #define WIN32_LEAN_AND_MEAN
     #endif
@@ -203,7 +205,7 @@ class _RealWebSocket : public easywsclient::WebSocket
         while (txbuf.size()) {
             int ret;
 #ifdef _WIN32
-            ret = ::send(sockfd, (int8_t*)&txbuf[0], txbuf.size(), 0);
+            ret = ::send(sockfd, (char*)&txbuf[0], txbuf.size(), 0);
 #else
             ret = ::send(sockfd, &txbuf[0], txbuf.size(), 0);
 #endif