Take advantage of Lua being type-less by binding generic methods that can handle all the supported data type conversion.
At the same time reduce the amount of the overloads generated by tolua++ which could be potentially just dead code.
Other misc Lua binding enhancements:
- VariantMap in Lua can be indexed using both string literal and unsigned int literal. Internally they are both converted to StringHash. Lua table of strings/variants and any registered user types are now accepted as RHS value when assigning VariantMap's value, the variant type would be set accordingly based on the lua object type. Refcounted object would end up as VAR_PTR while others as VAR_VOIDPTR.
- Variant knows how to convert to string implicitly.
