Fix GitRepo#inspect for nonexistent repos.
Add GitRepo#init!, which inits the repo with a gitignore.
Update GitRepo#repo_shell[?] to accept proper splatted shell args.
Add GitRepo#commit!, to commit the currently staged changes.
Add Babushka::GitFS, to snapshot the root fs as it changes.
Snapshot deps after meeting them when --git-fs is passed.
Merge branch 'git-fs'