remove important from page-header in css
use mean-postinstall
update package.json for core packages
Update jsHint to remove deprecated options and include all available options
Clean up gitignore file
Merge pull request #715 from baer/feature/clean-up-gitignore

Clean up gitignore file
change jshint globals to be read-only
Merge pull request #713 from baer/feature/update-jshint-for-new-options

Update jsHint to remove deprecated options + include all available options
comment out unused aggregateAsset weight example
loader livre
Mise à jour de mean
assets compris dans assets manager pour get les images (mean 0.5.10)
Affichage du loader lors du chargement des livres
Gestion du loader appliqué au autres média