The shortcode [bookie casa="value"]your text here[/bookie] will generate the following html <a href="http://url_for_casa_value">your text here</a>
The shortcode [promo casa="value"]your text here[/promo] will generate the following html <a href="http://url_for_casa_value">your text here</a>
[pinextra]your text here[/pinextra] will generate the following html <a href="http://your-server/pin-gratis-paysafecard">your text here</a>[pinextra id="ID_NUMBER"]your text here[/pinextra] will generate the following html <a href="http://url_of_page_with_that_page_ID">your text here</a>[pinextra slug="PAGE_SLUG"]your text here[/pinextra] will generate the following html <a href="http://url_of_page_with_that_SLUG">your text here</a>[pinextra text="your text here"] will generate the following html <a href="http://your-server/pin-gratis-paysafecard">your text here</a>The basic structure of this plugin was cloned from the WordPress-Plugin-Boilerplate project.
This plugin supports the GitHub Updater plugin, so if you install that, this plugin becomes automatically updateable direct from GitHub. Any submission to WP.org repo will make this redundant.