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
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
Added module directory name in the error message
Fixed shipping zone count
Fixed #933 (why so much code in a form definition ?!)
Check module dependencies only if the module is activated
Typos
Fixed class design
Improved error messages, fixed wrong path separator
Improved error messages (#933)
Fixed tests
Inproved error messages