Create Spot Model, Migrations, and seeders

[yoshelb]

• [x] model name is Spot
• [x] table name is Spots
• [x] Model must have: ownerId:integer,address:string,city:string,state:string,country:string,lat:decimal,lng:decimal,name:string,desciption:string,price:decimal
• [x] Migration must have: id, ownerId, address, city, state, country, lat, lng, name, desciption, price, createdAt, updatedAt
• [x] define relationships on Model and migration
• [x] Track down what all validations and requirements must be and where to put them.

[yoshelb]

remove custom messages and figure out how to use express validator to handle custom messaging