add brand api
add bulk pricing rules api (discount rules)
add category api
add product configurable fields api
add googleproductsearch api
fix text in client spec
add options and option_sets api
add option set option api
add option set value api
add product image api
add product option api
add product review api
add product rules api
add product video api
add product sku api
Merge pull request #32 from corthmann/add_mising_product_apis

Add mising product apis