append size_set_id to the query arg -- hard coded for now
LUN-1169 -- cropduster - cmsplugin-image integration so that the size_set_id can be sent to filer
LUN-1169 -- avoid caring size_set_if in filer because I can open cropduster from here as I ahve all imformation available: filer image id and size_set_id
Merge pull request #3 from pbs/LUN-1169

Lun 1169 - ImageField variable gets access to its corresponding size_set