Add epel and remi repo to CentOS 5/6

By default remi repo is not enabled. In remi repo can be found a newer version of MySQL.

## Remi Dependency on CentOS 6 and Red Hat (RHEL) 6 ## 

rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm

## CentOS 6 and Red Hat (RHEL) 6 ## (this repo is not enabled by default, check /etc/yum.repo.d/remi.repo file)

rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm

## Remi Dependency on CentOS 5 and Red Hat (RHEL) 5 ##

rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm 

## CentOS 5 and Red Hat (RHEL) 5 ##

rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm

## CentOS x64 RPMforge install