Add support for creating unified diff / patch files

[sschuberth]

Just wondering whether it would be in the scope of this project to also create the diff (after all, the project is called com.zutubi.diff, not com.zutubi.patch ;-)

The motivation is that there does not seem to be a good / maintained Java library to create diffs out there. However, maybe some code out of JGit's diff package could be used to create one.

@jsankey What do you think?

[jsankey]

Hi Sebastian,

The functionality in this library is a little narrow at the moment as it was implemented just to do what is required in Pulse. I'm quite open to extending the library, which is one reason I opened up the code, although I don't have the time to look at it personally at the moment.