WIP - Initial brainstorm/layout for how API routes will look

Includes route groups for primary resources and nested resources as appropriate
- All routes have been assigned appropriate names (i.e. users.comments.index)
- Route groups
    - users
    - tasks
    - task-groups
    - tags
    - comments
- Adds DummyController for ... fun? :)
Adds Todo\Models\Controllers and BaseApiController