Merge pull request #3 from jrha/master

Fix logo and standards compliance.
Remove the 'collapse' class for the navbar, to ensure it's shown in smaller devices
Merge pull request #4 from piojo/master

Show the navigation bar in small devices
Document the upgrade to JSON profiles
Do pygments for syntax highlighting of code snippets
Use old-style code syntax. :(
Fix the last paragraph of the JSON documentation
Improve the JSON review, based on feedback
Improve the JSON documentation.

Thanks to Cal for the feedback.
Document how to get the notifications working with JSON profiles.

There are a few changes to the build files that I forgot to mention.
Put the releae announcement under review.
Announce Quattor 12.12
Document the new Yum repositories
Move the JSON migration docs to documentation
Merge pull request #5 from piojo/master

Promote the JSON migration from review to documentation.
Add an example of how upgrades could be managed with the new SPMA.
Document the upgrade process to the new SPMA.
Continue documenting the mirroring layout
List one additional dependency for the new SPMA on SL5.
Finish the documentation on how to upgrade to the new SPMA