User stories for git-town

@charlierudolph @allewun adding user stories that describe end-user value
I like the first suggested line ("I want to quickly get this information"). I'm not clear about your proposed user value. How does knowing the currently installed version of Git Town make me stay up to date with ongoing development? How does that number make me know the features in later versions? So I'm leaving this out for now. Can you please clarify what you want to express here?