[ feature ] New Pack Command: Uninstall

[Matthew-Mosior]

This PR adds a new pack command uninstall, which can be invoked as follows:

$ pack uninstall

This pack command deletes the $PACK_DIR.

This PR closes #294.

[buzden]

Looks good, but I would expect pack printing it's currently configured $PACK_DIR and prompting that removing it (including user's config there) is indeed user's intention.

[Matthew-Mosior]

Looks good, but I would expect pack printing it's currently configured $PACK_DIR and prompting that removing it (including user's config there) is indeed user's intention.

Sounds good, I’ll go ahead and address this!

[Matthew-Mosior]

Looks good, but I would expect pack printing it's currently configured $PACK_DIR and prompting that removing it (including user's config there) is indeed user's intention.

This should be addressed via 6090c48.