DeliveryType Models & seed data added

Have changed DB design from the excel we made. For more info refer to
db/schema.rb
Merge branch 'DeliveryTypeDevelopment'

This reverts commit db651c48bb7e01fa49360f356e0c2cf1c2b3abff, reversing
changes made to f2e379c7bcf2b6b35309209cd7682de981a3f819.
Schema.rb add
Websites migrate fix