Merge pull request #119 from nickanderson/fix/git-integration-instructions

Add passphraseless key generation information
Remove unhelpful tags from overview pages
Clarify warn_only behavior: all such promises are not kept
Merge pull request #121 from tzz/master

Clarify warn_only behavior: all such promises are not kept
Revert inaccurate docs
Add tutorial
Merge pull request #123 from nickanderson/tutorials

Add tutorial
Add git information and links
Merge pull request #124 from nickanderson/tutorials

Add git information and links
Fix syntax highlightling
Merge pull request #125 from nickanderson/tutorials

Fix syntax highlightling
Merge pull request #122 from nickanderson/revert_ted

Revert inaccurate docs
Add instructions for installing git from EPEL
This is helpful for EL5 based distros.
Merge pull request #126 from nickanderson/git

Add instructions for installing git from EPEL
Improve description of steps for git integration
Because we are doing things from multiple machines it helps to
specifically call out which machine a specific step is to be done from.
Merge pull request #128 from nickanderson/git

Improve description of steps for git integration
Reorganize instructions for better flow
Many people were not seeing the instructions for pulling masterfiles
from git.
Merge pull request #130 from nickanderson/design-center-git-server

Reorganize instructions for better flow
Clarify who should be running commands from where