add idAuditUser as new class member; since the auditUser will always
stay the same during one session, this makes more sense than passing it
as parameter where required
add method to allow template retrieval based on groupId, enhance
getTemplates to allow this
provide wrapper method "sendCreative" to send only a single creative
fix adjusting of template after loading it via the REST API
add some more phpdoc style comments
fix variable name
cast dimY to int when setting it (when loaded via SVG, it will be of
type string!)
add support for more than one product id
fix method that updates the svg; 4x faster now and better runtime
behaviour