foreword translated
conventions translated
FR: 5 preamble files translated
revision and updates
final revision general tools section
finished final revision for 1.8
removed img from documentation guideline source
French translation from Marie Silvestre
Merge pull request #28 from MarieSilvestre/master

FR: 5 preamble files translated
Merge pull request #1 from qgis/master

Update 3 janv. 2013
update for group selected
little errors
restructured table
preamble files updates and index
enable pdf build again
corrected little mistakes
updated for proper pdf build
small fix
more updated for proper pdf creation
more updated for proper pdf creation