Merge pull request #105 from ktf/gh-pages

Adapt to new naming convention.
Merge pull request #106 from ktf/gh-pages

Add FAQ about the tagging convention.
Fix cms-addpkg.
Move fetch in the right position since the official-cmssw repo is defined by git cms-addpkg
Merge pull request #114 from ktf/gh-pages

Information about GUIs...
Typo.