Add support for blocks with arbitrary number of arguments

[smarr]

Currently, we only support blocks with up to two arguments (in addition to self).
So, the best we can do is [:a :b | #foo ] value: 1 with: 3.

Thus, we can't have blocks with 3 or more arguments. The implementation is currently also based on Smalltalk classes Block1, Block2, Block3 with the corresponding interface.

It would be good to lift that restriction and enable blocks with more arguments.
I am not sure what the best way forward is.
I am also not sure whether blocks should support currying or 'culling' (I think that's the term used in Pharo). So, basically the question is whether a block should handle activation with insufficient amount of arguments.

We should look into Newspeak, Pharo, TruffleMate, Grace, etc to see options on how to handle this.

[smarr]

A solution should also resolve the problem with issue #21.

[smarr]

Think @charig's solution is here: charig/TruffleMATE#31

[smarr]

@Richard-Roberts Did you see #215? @daumayr already implemented a solution. I just forgot about it. Is this what you need? Will try to look into merging ASAP.

[ghost]

@smarr This is what would I would have done. It would be good to get this into the dev branch if you have time (no rush though, it's only causing one Grace test to fail for now).

[smarr]

This is solved with #215.