Feature/send large message (#14)

* introduce send fragment

* can pass a fin frame

* can send messages which are a perfect multiple of the chunk size

* set fin only for last fragment

* cleanup

* last fragment should be of type CONTINUATION

* Add simple send and receive programs

* speedups receiving + better way to wait for thing

* receive speedup by using linked list of chunks instead of large array

* document bug

* use chunks to receive data

* trailing spaces

ixwebsocket/IXSocketServer.cpp

@@ -14,7 +14,7 @@
 #include <future>
 #include <string.h>
 
-namespace ix 
+namespace ix
 {
     const int SocketServer::kDefaultPort(8080);
     const std::string SocketServer::kDefaultHost("127.0.0.1");
@@ -42,13 +42,13 @@ namespace ix
     void SocketServer::logError(const std::string& str)
     {
         std::lock_guard<std::mutex> lock(_logMutex);
-        fprintf(stderr, "%s\n", str.c_str());
+        std::cerr << str << std::endl;
     }
 
     void SocketServer::logInfo(const std::string& str)
     {
         std::lock_guard<std::mutex> lock(_logMutex);
-        fprintf(stderr, "%s\n", str.c_str());
+        std::cout << str << std::endl;
     }
 
     std::pair<bool, std::string> SocketServer::listen()
@@ -83,7 +83,7 @@ namespace ix
         server.sin_family = AF_INET;
         server.sin_port   = htons(_port);
 
-        // Using INADDR_ANY trigger a pop-up box as binding to any address is detected 
+        // Using INADDR_ANY trigger a pop-up box as binding to any address is detected
         // by the osx firewall. We need to codesign the binary with a self-signed cert
         // to allow that, but this is a bit of a pain. (this is what node or python would do).
         //
@@ -216,7 +216,7 @@ namespace ix
 
             // Launch the handleConnection work asynchronously in its own thread.
             //
-            // the destructor of a future returned by std::async blocks, 
+            // the destructor of a future returned by std::async blocks,
             // so we need to declare it outside of this loop
             f = std::async(std::launch::async,
                            &SocketServer::handleConnection,