Changed column names in items table

In order to better align with the assignment changed the following 2 columns:
price -> reserved_price
sold -> sold?
Commit to begin work June-10

Need to complete the following functions within the models:
Auctioneer
  Add_item
  Start_auction
  Call_auction
  Queries_item (not started yet)

Participant
  Submit_bid
  Queries_item (not started yet)

Need to write tests for methods as well
Completed methods within models
Added database schema diagram
Merge pull request #5 from Onaracs/task/controllers_set_up

Task/model methods set up