Merge pull request #961 from bibich/improvements

Refactored virtual products to be more extensible
cache propel configuration. Fix #973
Merge pull request #995 from lunika/cache_config

cache propel configuration. Fix #973
Update toolbar.html
Merge pull request #998 from InformatiqueProg/patch-4

Too much '}'
Fixed admin module hooks modification page
Fixed admin module hooks modification page
Updated hook module.config-js to be specific to a module.