Adds instructions for generating and sending patches

README

@@ -38,11 +38,27 @@ any changes:
 
 git checkout submissions
 
-The acting editor of the inaugural issue of Circumlunar 
-Transmissions is mieum. Please direct all patches to: 
+After adding a submission to the "submissions" folder, add
+and commit changes in the ordinary way. Then issue the
+following command to generate a patch from your changes and
+send it using the local email system:
+
+git send-email --compose --subject="<SUBJECT>" \
+    --to="<ADDRESS_OF_EDITOR>"                 \
+    --from="<YOUR_CS_EMAIL_ADDRESS>" HEAD^
+ 
+The acting editor of the current issue is mieum. Please 
+direct all patches to: 
 
 mieum@zaibatsu.circumlunar.space
 
+If the above command fails, or if git send-email is not
+available on your system, generate a patch with the
+following command and send it to the editor as an email
+attachment:
+
+git format-patch HEAD^
+
 The current deadline for submissions is: March 29, 2021
 
 - - - ------------------------------------------------- - - -