Add `config.yum_config` and Config::YumConfig class for it
Add Redhat::YumProxyConf capability
Add helper methods to fetch resource file paths
Add awk script for modifying proxy configuration in yum.conf
Add ConfigureYumProxy Action
Document yum proxy configuration
Add changelog item
Add usage and license information to yum_config.awk
Merge pull request #4 from tmatilai/yum-proxy

Add support for yum proxy configuration