#4 single command to emulate branching in cvs

[Peter Miller]

Aegis puts a very different spin on what a branch means.

Brendan Simon <Brendan@BrendanSimon.com> has requested a single command to create a branch the way CVS dones. That is, to create a new branch which contains all of the files at the exact instance a previous delta was integrated.

This is possible now with multiple commands, including an aede -merge and the moving all of the ,B files back. The request is to make this a single command.

This probably means walking the change through the Aegis process. The aecpu -unch should be made optional.