Proccall is Broken

[btwooton]

Proccall is not written to accommodate NativeProcedure and the newly created PrimitiveProcedure and needs to be augmented to accommodate these types of Procedures. There is also a bug in the evaluation mechanism that seems to be rooted in Proccall_impl. A call to eval::Expression() on (define a 1) returns a DataNode.cdr runtime error on something that is not a pair.

[CinchBlue]

ProcCall now appears to accommodate both NativeProcedure and PrimitiveProcedure and Procedure as well as respect their respective semantics requirements as defined in our local meetings, as of commit 74dc3f3.

One interesting typo is that DataNode.cdr was also the label for the std::runtime_error for car(). So that's unfortunate. That was fixed by that commit as well.