add project joining info to guidebook

Author: Connoropolous

web/src/components/GuideBook/Sections/HowTos.js

@@ -14,7 +14,35 @@ const howTosItems = [
         description: (
           <ol>
             <li>
-              When the project goes in your queue...
+              When you try to join a project, by using a secret phrase given to
+              you by a peer with access to that project, Acorn will attempt to
+              form a network connection with any peer who is in that project, in
+              order to sync the project data. This is because no data is stored
+              on any servers, only on peers computers.
+            </li>
+            <li>
+              If no peer is found within 15 seconds, then you will be notified
+              of that, and your project will be placed in a queue for syncing,
+              where it will regularly check its status. If it has sufficiently
+              synced with a peer, then you will be able to access the project.
+            </li>
+            <li>
+              Note that not ALL data has necessarily been synced when you
+              access the project, and some data may take more time to become
+              consistent with your peers. If a peer is found, you are likely to
+              be able to immediately begin to access the project, although a
+              short sync period in the queue may be required before you can
+              access it.
+            </li>
+            <li>
+              If your project is not syncing, and you believe it should, then
+              you may have entered the secret phrase incorrectly, or the secret
+              phrase may have been shared incorrectly with you. The secret
+              phrase should always be 5 words. If you determine this is the
+              case, you can click 'Show details' in the project sync queue info
+              panel, and hover over the project of concern, and click the
+              'cancel' button that appears there. This will exit you from that
+              project and prevent any further syncing.
             </li>
           </ol>
         ),