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/IXSocketOpenSSL.h

@@ -17,15 +17,15 @@
 
 #include <mutex>
 
-namespace ix 
+namespace ix
 {
-    class SocketOpenSSL : public Socket 
+    class SocketOpenSSL : public Socket
     {
     public:
         SocketOpenSSL(int fd = -1);
         ~SocketOpenSSL();
 
-        virtual bool connect(const std::string& host, 
+        virtual bool connect(const std::string& host,
                              int port,
                              std::string& errMsg,
                              const CancellationRequest& isCancellationRequested) final;