Ev2 file/dir modifications and properties

It just eneterd my consciousness that Ev2's alter_directory and
alter_file operations apparently expect to receive a full set of
properties, if even one prop is being altered or deleted. I haven't
tested if that is in fact how it works, but it seems to me to be the
same kind of design bug as the list of children on a directory; i.e., it
would be a lot better if we sent a property diff instead of the whole set.

Thoughts?

-- Brane

-- 
Branko Čibej | Director of Subversion
WANdisco // Non-Stop Data
e. brane_at_wandisco.com