feat: show progress and fetch existing

[dalelotts]

Basically a complete re-write so massive changes.
In summary, clones repositories one-at-a-time and restarts from where it left off.

Added the option to fetch existing repositories before cloning new ones.

Changed the options so they seem to me to be related to the behavior. Removed -r true and added two new regExp options. Also allow exclude and include options at the same take.

Added verbose mode if you really want to see how the sausage is made.

Set version to 1.0.0 since this is a breaking change.

[coveralls]

Coverage increased (+18.9%) to 100.0% when pulling 4f4eff9 on dalelotts:slow-down into b3a4576 on tegon:master.

[dalelotts]

If you merge this, please do a squash merge. The commit history is not important.
If you decide not to merge it, please close it. =)