moved stream into synergy namespace (to prevent naming collision in win libs)

implemented ipc "hello" message (to identify client type)
integ tests working for hello message, but use of ipc in main program has problem with events.

src/lib/synergy/CArgsBase.cpp

@@ -21,7 +21,6 @@ CArgsBase::CArgsBase() :
 #if SYSAPI_WIN32
 m_daemon(false), // daemon mode not supported on windows (use --service)
 m_debugServiceWait(false),
-m_relaunchMode(false),
 m_pauseOnExit(false),
 #else
 m_daemon(true), // backward compatibility for unix (daemon by default)