Various things TODO:

obiously, add more commands
move validation logic into the command modules
much more extensive command validation: I do not ever want to see a script stack due to knowable error conditions (e.g., invalid branch name)
elmininate dependencies on static information (e.g., CWD) from utility components
write unit tests
generally, check for state of repositories (merging, etc.) before doing operations... also bare repos, "unborn" repos, etc.
use rebase status of meta-repo to track rebases
add slim rebase continue, abort, etc.
progress meters for remote operations (fetch, include, open, pull, etc.)

Open Issues to Watch

Currently, nodegit calls back on each object that is downloaded; this causes an amount of overhead that is prohibitive.