Fix incorrect instructions for integrating git into update policy
Merge pull request #117 from nickanderson/fix/git-integration-instructions

Fix incorrect instructions for integrating git into update policy
Add passphraseless key generation information
Some people seem to have issues with key generation. This makes it more
precise.
Add note about other authentication possibilities
Improve instructions for mission portal ssh key install
Fix permissions typo
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