Packaging improvements

[MadMan2k]

As far as I can see you are considering some packaging system updates.
I think it would be a good idea to collect all possible improvements to
introduce a bunch of them at one.

up to now I've seen the following:

- better package compression (7zip?)
- delta debs
- auto dependency removement

now I'd like to add
- customizable meta packages

there is already a problem with ubuntu-desktop being removed if the user
uninstalls only one of the "core" applications like evolution.
So obviously that metapackage has to be more flexible.

So why not doing it right from the start and giving the user the ability 
to create his own metapackages.

Use case:
John wants to compile something.
he creates a "i-want-to-compike-something" metapackage and the following 
install operations will be saved as a dependancy of it.

Now John realizes that compiling sucks and he rather wants to stick to 
binary packages - all he has to do is uninstalling 
"i-want-to-compile-something" and his system will be as clean as before.

M2k