made validating sku less granular.
Merge branch 'validate_sku'
accessory Entities, Fetching methods, and forms.
Added options to zoom
Merge branch 'master' into acessories
Finished UI for accessories
added more options to zoom and prime focal length.
added options to UI
For categories tab, the attributes I numerically ordered in asc order Zoom Focal Length and Prime Focal Length. Also, I fixed the ajax pop-up error for Accessories and Cross Sells.
changed an option in zoom focal length.