Do not auto commit on init

[Dodecahedr0x]

The commit during dapp init causes the process to fail if the user does not have a global git user and email defined. This prevents ds-test from being installed.

I then learned that you can run dapp install ds-test afterward but having a more robust dapp init command would be great.

[d-xo]

hmmmm, I'm not sure what we can do here? I think we would always want to install ds-test as part of dapp init, and since this requires adding a git submodule, we will always need to commit as part of dapp init.

Did you have some ideas on how this could be improved?