lego1: MxVariableTable (#87)

* MxStringVariable -> MxVariable

* cursor test

* GetVariable to 100

* meh

* node insert inline

* move to header file

* use reference to match available code

* variable table init in mxomni, some reshuffling

CMakeLists.txt

@@ -149,13 +149,13 @@ add_library(lego1 SHARED
   LEGO1/mxstillpresenter.cpp
   LEGO1/mxstreamer.cpp
   LEGO1/mxstring.cpp
-  LEGO1/mxstringvariable.cpp
   LEGO1/mxthread.cpp
   LEGO1/mxticklemanager.cpp
   LEGO1/mxtimer.cpp
   LEGO1/mxtransitionmanager.cpp
   LEGO1/mxunknown100dc6b0.cpp
   LEGO1/mxunknown100dc6e0.cpp
+  LEGO1/mxvariable.cpp
   LEGO1/mxvariabletable.cpp
   LEGO1/mxvector.cpp
   LEGO1/mxvideomanager.cpp