[-] WS : #PSCFV-10283, #PSCFV-7498 Fix product images behavior
[-] WS : #PSCFV-11895, #PSCFV-10748 Fix ampersand issue
[-] WS : Fix node_type behavior for associations, now the node_type attribute is linked to plural entities name (eg: category is now categories)
[*] WS : #PSCFV-12162 Webservices now work in conjunction with watermark module
[*] WS : #PSCSX-1563 Webservices allow to set position_in_category of products entity
[+] WS : Add JSON output, add "io_format=JSON" to your request
Merge branch '1.6' of https://github.com/PrestaShop/PrestaShop into 1.6
Revert unwanted file to commit