Changed ruby 1.8 style to 1.9 style
Deleted better errors file for output for sublime
Added logic for upload registration_form.css only for /auth/login page
 Added validations for product model, added in_stock and price field, and error.css.scss file for custom style for errors
Added sort menu for products
Added logic for price searching
Fixed price hash 700:10000 change for 700 ( Added TODO )