Reserve or Purchase a resource

[agSant01]

Reserve or purchase a resource. Free resources are reserved. Otherwise, they are purchased:

• Add a reserve from pgadmin, and I will do a GET on the new reserve.
• Add a new order from pgadmin, and I will do a GET on the new purchase.
• I will also look at the GET for all requests from a given user id, and do a GET for all the purchases from a user id.