Add organizers readme

for_organizers/README.md

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+This directory is for workshop organizers, rather than learners (keep in mind, though, that this is still a public repository and everything here is visible to anyone).
+
+# Tips for presenting
+
+We use **liascript** for slides and **Teams** for meetings. 
+
+Read through important instructions for setting up and running workshop events here: [job aid for Arcus Skill Series webinars](https://chop365.sharepoint.com/:w:/r/teams/RSCH-Arcus/Shared%20Documents/Arcus%20Drive/Education/Arcus_Internal_Education/SQL%20Synchronous%20Series/job%20aid%20for%20setting%20up%20Arcus%20Skill%20Series%20webinars.docx?d=w0c203230b36d4df9b50c0cee9038c938&csf=1&web=1&e=SGkPwe).
+
+## Liascript slides
+
+The following settings in the liascript header are very important: 
+
+```
+mode: Presentation
+@onload: window.LIA.settings.sound = false
+```
+
+These set the slides to display in slide mode (vs. textbook), and prevent the browser from automatically reading the speaker notes out loud, which is otherwise the default.