#30 Sales Bake, Sales still not complete
#30 Some progres on sales
#30 Some changes in Customers, Employees, TaxNumbers
#30 Unicorn format
Merge pull request #40 from bittion/feature/iss30

Feature/iss30 Fix #30
#35 Enhaced Inventory interfaces, and registres prices progress
#35 Rgisterin Prices (still not deleting nor editing)
#35 Rgisterin Prices (still not deleting nor editing)
#35 Rgisterin Prices implementig Editing and Delete
#35 Rgisterin Prices implemented unicorn format in all inventory, added date to prices
#35 items registering
#35 validations in amount of prices
#35 commit-merge