Add possibility to clone the repos over HTTPs

[dsusviela]

Hello everyone, thanks for updating this very useful repository

Upon doing the setup myself I found that there was no built in way to clone the repos over HTTPs instead of SSH. If this is something that we want to add, then I can work on a proper solution in the bash script, as this solution is a bit scrappy.

Essentially I created a clone of the .gitmodules file which changes all urls to HTTPs instead named .gitmodules-https. Then in the instructions, i added a bit of bash to just replace the .gitmodules file with this one.

The disadvantage of this is that it would require 2 updates when adding/deleting new repos. Like I said, I could change the bash to simply scan the .gitmodules file and replace the git@github with the HTTPs url if we want this

Thanks