[V3dot10] PackgeInfo

[Keith Hodges]

In my looking around, I discovered that Monticello (optionally) expects 
PackageInfo to keep track of the methods that have been overridden.
(PackageInfo-overriddenMethods) This ensures that overridden methods are
not lost. However the PackageInfo in 3.9 doesnt do this, no wonder 
Stephane and Marcus had problems.

There is a fixed PackageInfo in
http://bugs.squeak.org/view.php?id=5715 I have TEMPORARILY put it into
http://www.squeaksource.com/Installer as well.

There does not seem to be a place for working on Monticello, since the 
Squeaksource project is not open access.

I have started working on Monticello a bit myself. I have refactored 
some of Ralphs code and merged in the remaining fixes from both wiresong 
and from Impara.

Best Regards

Keith