Create FAQ

FAQ.md

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+**This is WIP!**
+
+**Table of Contents**
+
+[TOC]
+
+# How do I log in?
+# How do I start a new room?
+# How do I start a new direct message?
+# How do I join an existing room?
+# How do I join an existing room on another server?
+# How do I change the title of a room I manage?
+# How do I change the topic of a room I manage?
+# How do I change the permissions of a room I manage?