reservation passes exists test
Add attr_accessors for User initialization:
* username
* password
* email
* address
* phone
Created specs and entity for messages and listings
Merge pull request #35 from felguerez/user

Add attr_accessors for User initialization: username, password, email, address, phone
Merge pull request #36 from felguerez/listing_entity

Brandon: created specs and entity for messages and listings
-> Reservations now have a start date, end date, lister id, renter id, and rate
Merge pull request #37 from felguerez/reservation_entity

Reservation entity
Merge pull request #38 from felguerez/development

Merge with Master