Metadata
CategoryFacet in Products + fix comments about metadata in Products
Shops and Producers in Products
Prices in Products and fix typo in Producers
Properties
add fields is_filter, add feature from api v3
products with best offer
fields for best offert
add is_filter to shopFacet
async request support
change in log request
Merge remote-tracking branch 'origin/metadata' into async

Conflicts:
	src/ClientApi/Rest/RestClientApi.php
add getAsyncRepository in ApiKit
async repo
fix methods in repo
add async repositories in ApiKit
Merge remote-tracking branch 'origin/async' into async
easier use async repository
repair test
fix bug: save empty response to cache