#158 Diff summaries for use outside of Kdiff3

[Anders Borg]

A feature that would have been very useful to me is the kind of diff summaries that revision control systems provide, that I could save with each release for quick review of changes and as a base for release documentation. Optimally there would be different types:
- Suited for exact knowledge of every detail change
- Summaries suited for documentation
I'm not sure where to draw the line for details in the latter, but there would need to be a section per changed file (unchanged files should be left out completely). The most basic mode could be a listing of changed files, date of change, and possibly some indication of the amount of changes.

It should be possible to create such summaries for a whole project (to a single file preferably).

[John11]

I would like this too - e.g. as a minimum in the GUI status line, saying number of different lines found.