Introducing the new EventSlot which is itself an event handler, so now we don't need a hooker to catch all events and then dispatch to activities
Remove ActivityEventAttribute cos it's not used anymore
Put IsPublished in product editing page to the topbar (save, save and publish)
Better menu injection
Duplicate Product.PriceFrom and Product.PriceTo to improve query performance and misc bug fixes
Event handler should be able to access current CommerceInstance from parameters; fix bugs for multilingual caching
Minor fix
Unit testing CachedTranslactionStore
Fix: Sort field type is incorrectly resolved when searching lucene index
Refactor multilingual
Remove currency from api because the currency is fixed, and misc refactoring on api
Search: now it will have a higher boost on product name field
Misc ui improvements for multilingual addin