split handshake code into its own files, so that Transport file is less massive

test/cmd_websocket_chat.cpp

@@ -226,7 +226,7 @@ namespace
     }
 }
 
-TEST_CASE("Websocket chat", "[websocket_chat]")
+TEST_CASE("Websocket_chat", "[websocket_chat]")
 {
     SECTION("Exchange and count sent/received messages.")
     {

test/run.sh

@@ -2,7 +2,7 @@
 
 mkdir build 
 cd build
-cmake .. || exit 1
+cmake -DCMAKE_BUILD_TYPE=Debug .. || exit 1
 make || exit 1
 
 ./ixwebsocket_unittest ${TEST}