Added Handshake class

Fixed NetworkBuffer include
Fixed some data types
TcpClient: Added SendBytes, SetOnDisconnectCallback, SetOnConnectCallback, SetOnMessageCallback methods and made callback std::function's private and fixed some method implementations
Added AcceptConnection on TcpServer
Fixed TcpServer AddToClientsList

src/Handshake.cpp

@@ -0,0 +1,40 @@
+#include "Handshake.hpp"
+#include "Utility.hpp"
+
+Handshake::Handshake()
+{
+	id = -2;
+}
+
+Handshake::Handshake(uint16 id, byte con_code)
+{
+	this->id = id;
+	this->con_code = con_code;
+}
+
+Handshake::~Handshake()
+{
+}
+
+const std::vector<byte>& Handshake::EncodeHandshake(const Handshake & handshake)
+{
+	std::vector<byte> handshake_bytes;
+
+	std::vector<byte> id = Utility::BitConverter::FromUint16(handshake.id);
+	std::vector<byte> con_mode = Utility::BitConverter::FromUint8(handshake.con_code);
+	
+	handshake_bytes.insert(handshake_bytes.end(), id.begin(), id.end());
+	handshake_bytes.insert(handshake_bytes.end(), con_mode.begin(), con_mode.end());
+
+	return handshake_bytes;
+}
+
+Handshake & Handshake::DecodeHandshake(const std::vector<byte>& bytes)
+{
+	Handshake handshake;
+	
+	handshake.id = Utility::BitConverter::ToUint16(bytes);
+	handshake.con_code = Utility::BitConverter::ToUint8(bytes, 2);
+
+	return handshake;
+}