Update intro.md

_sections/intro.md

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-Hello! <a href="https://github.com/cyoung/stratux">Stratux</a> is free software that enables DIY and low cost ADS-B receivers for pilots.
-It's easy to build an ADS-B receiver from the <a href="#parts-list">parts list</a>, or there are many inexpensive <a href="#pre-built-units">pre-built</a> options available.
+<a href="https://github.com/cyoung/stratux">Stratux</a> is free software that enables DIY and low cost ADS-B receivers for pilots.
+It's easy to build an <a href="https://en.wikipedia.org/wiki/Automatic_Dependent_Surveillance–Broadcast">ADS-B</a> receiver from the <a href="#parts-list">parts list</a>, or there are many inexpensive <a href="#pre-built-units">pre-built</a> options available.
 
-Stratux-based ADS-B receivers are the **only** full-featured receivers on the market that are compatible with <a href="#efb-compatibility">every major EFB</a>.
+Stratux-based ADS-B receivers are the **only** full-featured receivers on the market that are compatible with <a href="#efb-compatibility">every major EFB</a> and the <a href="http://wiki.glidernet.org">Open Glider Network</a>.
+
+You can support Stratux by <a href="https://www.paypal.com/paypalme/stratuxeu">buying the devs a coffee</a> or contributing to ongoing coding efforts in our <a href="http://slack.stratux.me/"> Slack channel</a>.