Merge pull request #429 from s0undt3ch/develop

Fixes and Improvements
`systemd` in openSUSE 12.2 complains if service does not contain `.service`
Update changes log
Fail if installing EPEL also fails
Use the Fedora URLs to install EPEL
Properly detect openSUSE with `lsb_release`. Fixes #430.
Update changes log
Simplify (`-eq` || `-gt`) into `-ge`.

Thanks @cingeyedog for pointing this out.
Drop the `tsflags` requirement for RHEL and RHEL based distributions
Update changes log