Added Reader/Writer methods and tests for <itunes:title> on entry level

[podcasthosting]

There is a (new) field in the Itunes podcast spec for the episode title.
See https://help.apple.com/itc/podcasts_connect/#/itcb54353390 > Episode descriptions > itunes:title

The pull requests adds the missing methods for reading and writing a feed and the tests.

[froschdesign]

@podcasthosting
Do you know if there is finally a file for the DTD?

[froschdesign]

Mmmmh, a test class for the entire Zend\Feed\Reader\Extension\Podcast\Entry is missing.
I will create a separate issue report for this problem.

[froschdesign]

@podcasthosting
Thanks for your contribution, I will check later in the day.

[froschdesign]

@OpenHaus
Can you answer my previous question?

[froschdesign]

Looks good to me. 👍

(The coding standard is a separate topic and is related to the whole component.)

[froschdesign]

@podcasthosting @OpenHaus
Please use the develop branch for new features. Thanks!

Compare with: https://github.com/zendframework/zend-feed/blob/master/docs/PULL_REQUEST_TEMPLATE.md

[podcasthosting]

@podcasthosting
Do you know if there is finally a file for the DTD?

It does not seem so. The uri referencing the DTD in the specs is not reachable:

<rss xmlns:itunes="http://www.itunes.com/dtds/podcast-1.0.dtd" version="2.0">

I have no further information.

[froschdesign]

@podcasthosting

I have no further information.

Okay, thanks for the feedback anyway. 👍
(I was hoping we could simplify the unit tests.)

[weierophinney]

Thanks, @podcasthosting! I rebased your branch against develop, and merged against develop for the upcoming 2.12.0 release.