important changes in scmproj plugin

[Nicholas Allen]

>
> In what sense?
I meant is there a command "project-merge" that allows me to merge a 
project and all its sub branches into the branch I am working on and 
then when I commit it would commit the merge in all sub branches, update 
the revision ids for each branch in the project, and then commit the 
project file with this configuration info.

Nick