LuaD enhancements

Fixed static arrays.
Fixed support for calling functions which receive const args.
Rework struct to use userdata; conversion is not lossy, conversion should be faster, less garbage, supports more features (methods, properties).
Classes improved to support fields, properties.
Static type interfaces and creation of struct instances in Lua code.
Default construction is supported in static type interfaces in lieu of a constructor.
I'd say no. I'm sure there are a couple of others that I missed too.
This whole block of code seems really horrible to me... it feels pretty lame excluding a whole bunch of magic function names. I couldn't think of a better way though.