mozcommitbuilder should allow exit with saved state

[gerv]

Using mozcommitbuilder, I get asked "good, bad or skip?". I would like an option "exit", which then told me what it had discovered so far and even gave me a command line to resume where I left off.

This would have been very useful during a recent long bisection where it was only using 1 core and I wanted to change to use all 4!

In fact, when it prints progress after each bisection, it should print enough info to allow you to restart if the program or your computer crashes.

[samliu]

This is a good idea. I'll see what I can do!