Add User model and specs

- tests for validation: first_name, last_name, email
- test for email uniqueness: there is a gem called shoulda-matchers
that could be used for something like this.  For now I just created
two users with the same email and verified the first was valid and
the second wasn't.
- last test was for a valid username between 2 and 32 characters
Item model generated and tested for validation
Clean up
Add categorization

tests passing for item.categories and category.items
Add tests for items

Testing GET index
adds front end navbar and functioning carousel
User can now view items by category

Added items and categories controllers and specs
adds order model, begins building relationship to address model
Merge branch 'development' of https://github.com/ericfransen/dinner_dash into development
adds partials for carousel and navbar
adds menu_item containers for the home page and puts them in a partial.
renames marketing containers partial
Merge branch 'bootstrapping' into development
adds bootstrapping to views and partials

 adds bootstrap and partials
converts erb views to haml
adds cart model
Adds Items, categories, and their respective links to seeds.rb
Merge branch 'development' of github.com:ericfransen/dinner_dash into development
Merge branch 'views' into development
CRUD items
CRUD categories