r8821: continue the trend to move to a more OO style of interface for our js

r8821: continue the trend to move to a more OO style of interface for our js
calls. This changes the generated RPC and IRPC calls to use the 'this'
object pointer instead of requiring the passing of the object on each
call. So typical usage is now:

var echo = echo_init();
var io = irpcObj();

status = echo.connect("ncacn_np:server");
assert(status.is_ok);

io.input.in_data = 7;
status = echo.AddOne(io);
assert(status.is_ok);