MxTickleManager mostly done (#94)

* Checkpoint to show MxTickleManager::SetClientTickleInterval match.

* Match MxTickleManager::~MxTickleManager, obliterate MxTickleManager::SetClientTickleInterval.

* Make conditional more realistic, move MxTime to mxtypes.h, add TODO for MxTickleManager::Tickle.

CMakeLists.txt

@@ -150,6 +150,7 @@ add_library(lego1 SHARED
   LEGO1/mxstring.cpp
   LEGO1/mxstringvariable.cpp
   LEGO1/mxthread.cpp
+  LEGO1/mxticklemanager.cpp
   LEGO1/mxtimer.cpp
   LEGO1/mxtransitionmanager.cpp
   LEGO1/mxunknown100dc6b0.cpp