Load fix

Fixes issues in Load.

* removes TypedPipe `++` and instead goes down to Cascading to get the info. This should make Load less fragile with regards to serialisation issues.
* breaks closure in Splitter that introduces serislistation issue.
Did this test break for you before fixing the delimitted Splitter?

I implemented this test over the weekend with the old problematic delimited Splitter code, and unfortunately it ran fine.

Still a good thing to have the test of course ... I'm just curious.