lanes: Upgrade to 3.6.0
LuaPlusCD: Remove extraneous Push() forward declaration
Add LuaObject::IsValid() to determine whether the attached Lua state is valid
Remove the TODO #ifdef internally surrounding the LuaObject::DeepClone implementation
Fix crash bug in LuaObject::Lookup

buf could go out of scope before the key was used in the lookup.
Fix MergeObjects() to create the table in the right Lua state