Things to remove for 2.0

[Gioele Barabucci]

Aaron Bentley wrote:
>> I still don't see many practical uses for a split operation that does not
>> really split a directory off a tree, it just hides the other directories.
> 
> It doesn't hide them.  They are gone from that tree.  They exist in the
> history, because history is not mutable.
I'm not suggesting to make split modify the branch history. It should create 
a new branch with a refined/filtered history. See the example code at the 
end of this email.

> The practical use is that it retains the ability to merge with related
> trees.  In particular, it makes Nested Trees possible.