Tag 1.3.2.1

[benlk]

• [x] all issues in 1.3.2.1 milestone
• [x] update description in readme.txt and plugin description comment. https://github.com/INN/pym-shortcode/blob/a439690dafcd97e1352ba554393926b9a0b68740/pym-shortcode.php#L5
• [x] testing in accordance with todo list and updating the docs/testing doc: 2h max
• [x] update version number
• [x] update release.sh from INN/docs copy if applicable
• [x] update repository description on Github; presently it's:

  A plugin adding a [pym src=""] shortcode to simplify the process of using http://blog.apps.npr.org/pym.js/

• [x] copy release notes from https://github.com/INN/pym-shortcode/releases/tag/v1.3.2.1-rc1 into the release notes for 1.3.2.1, or just replace the 1.3.2.1-rc1 section of the changelog with 1.3.2.1
• [x] shoutout to the testers

[benlk]

Release candidate 1: https://github.com/INN/pym-shortcode/releases/tag/v1.3.2.1-rc1

[benlk]

Make sure to credit Mike Janssen of Current.org for his help in testing the release candidate.