Update index.md

Updated URL for epel-release-7-2.noarch.rpm. It is now under the 'e' directory.
Merge pull request #66 from EmbassySys/master

Update index.md
Fixes #7906 - Add user guide section on mirroring the puppet forge.

In addition to adding the section, this commit takes all line breaks out of
paragraphs in order to let hte browser format the page.
Merge pull request #61 from bkearney/bkearney/puppet-forge-integration

Fixes #7906 - Add user guide section on mirroring the puppet forge.