Beginnings of the "pass everything using a native type wrapper" console code.

- ConsoleValue class is now the base value class.
- ConsoleValueRef is now used to supply function parameters. Values are disposable.
- Script functions return values instead of just strings where possible.
- Variables can be disposable strings
- Bytecode changed

Fix the issues with console method parameters and fields which prevented missions from loading.

Engine/source/console/SimXMLDocument.h

@@ -57,7 +57,7 @@ class SimXMLDocument: public SimObject
       // tie in to the script language.  The .cc file has more in depth
       // comments on these.
       //-----------------------------------------------------------------------
-      bool processArguments(S32 argc, const char** argv);
+      bool processArguments(S32 argc, ConsoleValueRef *argv);
       bool onAdd();
       void onRemove();
       static void initPersistFields();