Allow for different commits ahead of master amounts, not just 1

[06kellyjac]

I'd imagine most people are happy with between 1-3 or 1-5 ish commits ahead of master on a branch.

Maybe add: maximumCommitDivergance: X OR maximumCommitsAhead: X OR maximumCommitCount: X

maximumOfOneCommit: true/false could either be kept or deprecated

Would love to hear your thoughts

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I'm happy to work on this feature at some point but I have a couple other tasks that are higher priority right now

[andrewrynhard]

I have been thinking about making an option that is integer based for some time now. Naming is hard, but we can figure that out. I like the idea.