Polish the SPMA upgrade guide.
Add a document on package management
Put it under review
Merge pull request #9 from piojo/update-pkgs

Add a document on package management
Merge pull request #10 from piojo/update-pkgs

Put it under review
Finish the documentation on package management
Warn against priorities
Merge pull request #11 from piojo/update-pkgs

Finish the documentation on package management
Adjust URLs in some links.
Merge pull request #12 from piojo/yum-upgrade

Yum upgrade
Add a link for the basic recommendations on SPMA and Yum
Move all the Quattor 13.02 out of review
Fix some broken links
Remove ohloh widgets for they look ugly now
Merge pull request #13 from piojo/no-ohloh

Remove ohloh widgets for they look ugly now
Add an announcement for the compiler
Merge pull request #14 from piojo/announce-pan10

Add an announcement for the compiler
Remove all of sidebar.
Remove sidebar from remaining layouts.
Remove CSS rule for sidebar.