Feature/redis (#23)

* Fix warning

* (cmake) add a warning about 32/64 conversion problems.

* simple redis clients

* can publish to redis

* redis subscribe

* display messages received per second

* verbose flag

* (cmake) use clang only compile option -Wshorten-64-to-32 when compiling with clang

CMakeLists.txt

@@ -15,6 +15,10 @@ if (NOT WIN32)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra -pedantic")
 endif()
 
+if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshorten-64-to-32")
+endif()
+
 set( IXWEBSOCKET_SOURCES
     ixwebsocket/IXSocket.cpp
     ixwebsocket/IXSocketServer.cpp