post_type archive pages do not display the title for that post_type

[benlk]

Example: http://southeastenergynews.com/digests/

The intended display should be for the title and the RSS feed for the `post_type to display, but that's not the case.

In the specific case that the post_type is rounduplink, Largo has a case in archive.php to cover that: http://southeastenergynews.com/rounduplink/

Largo even has a filter for that: https://github.com/INN/Largo/blob/bf7117fe5d3348bf7f42ad406db2b020d3cdaa55/archive.php#L49-L57

However, Largo does not have a case for generic post_types.

• cover the generic post_type archive case