Created new rails app for Tow Lot Lab

* Created db wdi_3_rails_lab_migrations_development
* Ran initial 'creation' migration for Vehicles table
Lab through Step 6 Complete

* Added 4 additional migrations
  * Added pick up date to vehicles
  * Removed tow truck bool from vehicles, created new tow trucks table (reversible)
  * Added additional columns (mileage, service date) to tow trucks table
  * Added column for vehicle type/category to vehicles table
Lab Step 7 Complete

* Created index for vehicle type in vehicles table
* Made vehicle type column not accept null input
Lab Step 8 Complete

* Migration to add tow fee amount and full paid bool columns to vehicles table
  * Also added timestamp columns to vehicles table
* Migration to add timestamp columns to tow trucks table