Add FileTranslations API client (CON-1998)#147

PavelLoparev merged 3 commits into4.0.0-g7Smartling/api-sdk-php:4.0.0-g7from

CON-1998-add-fts-api-clientSmartling/api-sdk-php:CON-1998-add-fts-api-clientCopy head branch name to clipboard