Add support for numbered git branch

[oryband]

Hi! Great plugin, I just switched from scm_breeze and am having a breeze (ha!)

One thing I'm still missing from breeze is the git branch support: Breeze enumerates git branch names, and it's very useful for various branch actions e.g. checkout, delete, rename with -m, etc.

Can you please add support for this?

[morozgrafix]

Would love to see that as well. I wonder if branch numeric values would conflict with file numeric shortcuts. Maybe they would need some sort of extra prefix or suffix.

[edelgado]

+1 :-)