Merge pull request #82 from shipleyr/bugfix/catalog-manager

Removed php style "=null" from a function parameter.
fix crumb fetching for product/category, and fetch in product/category controllers and pass to layout
fix abstract mapper getModel method
fix persistence (from controller) of options in catalogmanager, depends on find method using only pkey field(s) - added method
implement enabled for products, and event on productuom update, if all uoms disabled, prdouct is disabled
trigger event in productuom insert and update
Merge branch 'master' of git://github.com/speckcommerce/SpeckCatalog
Added Null filters to id's that should be null instead of an empty string