added rspec tests to user model; added user seed data
added sales model
added validations to sale model
added Item model
 added validations and associations to Item model
added Transaction model
added seed data for sales
added seed data to Items table
 added seed data for transactions
modified rspec
restored .rspec file to match master
Merge pull request #1 from dantecarlesimo/models

Added Sale, Item, & Transaction Models; added seed data for each table.
added rspec tests for Item and User models
installed paperclip gem, removed unneeded columns from Items and Users tables
Merge pull request #2 from dantecarlesimo/models

Added some basic rspec tests for Item and Sale Models
Merge pull request #3 from radcliff/models

Merging Models to Master
updated paperclip gem to fix generator problem
added paperclip to Item and Sale models & created default image
added more specs to models/sale_spec; added requests/sale_management_spec w/ devise support
rails generate controller sales, responds_to json; protect; resources :sales (routes);