Fixed setVal function for MetaData. no value was affected.
Added possibility to check auth for module in admin-layout.tpl
Added missing hooks on frontOffice template

Added missing hooks on frontOffice template

Added missing hooks on frontOffice template
Updated sql for new hooks

Fixed sql script
Fix all CS issues
add email preview routes
added argument fields in hookblock function to explicitly set the variables that will be exported.
new hooks in backoffice template to add new tab to product, category, content, folder, brand edit page. added argument fields to existing hookblock
Updated sql script for new hooks
Integrate the preview
added argument id to hook tab-content
Fixed admin module routing. Wrong argument name.
Added extra argument to set the context of the hook module-tab-content
Added a fallback for template to use the default template. it's usefull for modules that are used on a website that doesn't use the default template
Merge pull request #930 from lovenunu/improve-cs

Fix all CS issues
Merge pull request #928 from bibich/improvements

Improvements
Merge pull request #931 from lovenunu/email-preview

Implement email preview in back office