Create Comic factory to retrieve comics from the API
Adds ComicsListCtrl to retrieve a list of comics from the API.

Adds corresponding view to display such list.
Adds filtering options to /comics page.

User can filter what type of comics wants to display, and also
filter them by publishing date.
Adds ComicCtrl to display a single comic at /comics/:id

Also updates CharacterCtrl view to link to a comic when clicking
on its link.
Adds feature to list and navigate a character comics.