Define ProductPrioritySet interface
Remove TestUnit
Create ProductProritySet module with its ProductPriorities table and ProductPriority model to control next batches of product to be queried on Amazon
Define ProductPrioritySet send_next_batch method to be called by a Worker
liking product will send asins of similar products not in the db and id of liked product to Product Priority Set
Add model tests for ProductPriority class
* Add factory for Product Priority
* add 'add_to_set' test for ProductPrioritySet module
Create tests for identifying missing asins
* Add delete_persisted_product_priorities test for ProductPrioritySet
* Add factory-girl product hash
Add ProductPrioritySet next_batch test. NOTE: gives deprecation warning for #count method
Merge master branch with current branch
add reminder to save prods to session
* Updated labeling of sim_products to correct asins_of_sim_prods to match model
* Add persist_products test for ProductPrioritySet module
Add handle_new_products tests for ProductPrioritySet module
Like action will save like to array of liked product ids in the session params
Merge branch 'rel_prod_filter' of https://github.com/ShopIt2Me/sitm into rel_prod_filter
Like action complete on backend
* Correct association assignment for product if product already exists
* Add two more tests to evaluate relationship of parent product and similar product
modified product#like action to convert product ids to integer before saving to ary_of_likes in session value
uncommenting set method