Bugfix suggested by colin to disable cURL's default 100-continue expectation (https://groups.google.com/group/shopify-api/msg/312bddc43b6404c3)
Bugfix suggested by colin to disable cURL's default 100-continue expectation (https://groups.google.com/group/shopify-api/msg/312bddc43b6404c3)

noerjeffries/ohShopify.php,notmaintained/shopify.php,rrrhys/ohShopify.php,cmcdonaldca/ohShopify.php,whatsbrand/php-shopify-api-client,Web-In-Color/ShopifyAPIClient