Scaffolds and migrations

  - add scaffolds for dish_types, production_plans
  - add migration for dish_type
  - add dish_type_id in dishes table
  - fix validations in models
  - add primary key in complains table
  - fix drop method in migration for dish_types table
  - add seeds for initial filling db
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Committer: Vampirka <vampirka@Vampirka>
#
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
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#	modified:   config/database.yml
#	new file:   db/migrate/20140301114355_create_foodstuff.rb
#	new file:   db/migrate/20140301120133_create_supplies.rb
#	new file:   db/migrate/20140301120152_create_providers.rb
#	new file:   db/migrate/20140301120211_create_cashbox.rb
#	new file:   db/migrate/20140301120228_create_employees.rb
#	new file:   db/migrate/20140301120259_create_appointments.rb
#	new file:   db/migrate/20140301120315_create_menu.rb
#	new file:   db/migrate/20140301120330_create_dishes.rb
#	new file:   db/migrate/20140301120400_create_production_plans.rb
#	new file:   db/migrate/20140301120420_create_clients.rb
#	new file:   db/migrate/20140301120438_create_complaints.rb
#	new file:   db/schema.rb
#