Twenty Fourteen: Align post format handling with Twenty Thirteen

[anonymized_8769252]

As a follow-up to #24858, the handling of the post formats in Twenty Fourteen should be aligned with how Twenty Thirteen or _s does this.

[anonymized_8769252]

The changes:

• Deleted content-post-format.php and content-single.php.
• Added template parts for each of the supported post formats.
• Updated index.php, search.php, archive.php and single.php to match the new structure of the template parts.
• Moved the archive/single view display logic into the templates.
• Moved the display of the post format, the categories and the tags into custom template tags to avoid code duplication.
• Removed the title output for certain post formats instead of hiding it via CSS.

Gallery Post Format:

In the old content-post-format.php there was specific code to handle the thumbnail images differently for archive and single views.

However the twentyfourteen_get_template_part() function didn't use this template for the display of the gallery post format.

The new content-gallery.php includes this different handling for archive and single views, which might or might not be the authors intention.

[obenland]

Updated patch based on Frank Klein's work.

[lancewillett]

In 25088:

Twenty Fourteen: Align post format handling with Twenty Thirteen. Props Frank Klein and obenland, see #24877.

[lancewillett]

Leaving this ticket open for more testing.

[MikeHansenMe]

The patch failed when applied for testing.

[obenland]

It is already committed, it only needs some additional confirmational testing.

[MikeHansenMe]

Guess I missed comment 5... I will what is currently committed.

[obenland]

This is good to go. If you find a bug related to this, feel free to open a new ticket.

[lancewillett]

In 25768:

Twenty Fourteen: remove two unused files, should have been deleted with r25088, see #24877.