Implement tasks routes and stub out controller action

Defining a controller method with TODO automatically returns a 501 Not
Implemented HTTP response. Other methods include Ok() and Redirect(route)
Create Task model and stub out basic methods

In IntelliJ use New > Package > models then New > Scala Class > Task.
Add #tasks action and view
Implement H2 in-memory db and Task schema

The database configs go in conf/application.conf, the "migrations" are called
"evolutions" and live in conf/evolutions/default/[filename].sql
Implement basic CRD functionality for Task

DB.withConnection { implicit c => } allows execution of SQL("") statements.
Additionally get[Type]("field") function allows access to the DB.