Don't fail if only one of the openSUSE repositories failed to update.
Install `ca-certificates-mozilla` in openSUSE in order to be able to clone from GitHub's HTTPS service.
Clone using the git protocol instead of HTTPS to avoid SSL errors.
Since Arch's stable deps function just sets up the repository, call that instead of duplicating code. Fixes #139.
Update ChangeLog
Merge pull request #140 from s0undt3ch/develop

openSUSE and Arch fixes