ProductPage - make Code unique

Fixes #84

Added unique index on Code. Added AjaxUniqueTextField for Code.

Updated depreciated GridField component call on GridFieldBulkUpload.

Changed Code from Text to Varchar(100)

Signed-off-by: Jason Irish <jirish@dynamicdoes.com>
CMS Field Clean Up

Fixes #87, #82, #73, #74

FoxyCart_Controller - SSO cleanup

comment clean up

cleaned up code from removed EnableSSO option in SiteConfig

removed if check from SSO in FoxyCart_Controller

Enable SSO if checks
Merge pull request #94 from jirish/cmsCleanUp

CMS Field Clean Up
Merge pull request #95 from jirish/productCode

ProductPage - make Code unique
CMS instructional copy and Option Groups

Fixes #23, #86

static names for CMS on product classes

work on class statics for CMS