Change fixture URLs to use HTTPS

According to GitHub's documentation, the HTTPS protocol is preferred and
the "git://" protocol is not even listed as an option anymore.

See: https://help.github.com/articles/which-remote-url-should-i-use
Merge pull request #76 from kruton/fixture-urls

Change fixture URLs to use HTTPS
Fixes Travis CI checks with Ruby 1.8.7 and lower
Merge pull request #75 from kruton/fix-travis-tests

Fixes Travis CI checks with Ruby 1.8.7 and lower
Percona RPM repository
Merge pull request #77 from kronostechnologies/master

Percona RPM repository
Add extrarepos dynamically instead of hard-coding
Add support for Fedora
Add ksplice repo support
Add suppport for the yum-fast-downloader repo
Add my own borg repo
yum-updatesd: allow emit via email
disable fedora temporarily