Add facility for Contributors to invite experts to contribute Report

submissions/templates/submissions/contributor_referee_invitation_email.html

+[Please fill in the TO field above (keeping partners@scipost.org in cc)]%0D%0A
+%0D%0A
+Dear ...%0D%0A
+%0D%0A
+There is a Submission undergoing refereeing at SciPost, for which you might consider contributing a Report or Comment:
+%0D%0A
+%0D%0A
+{{ submission.title }}
+%0D%0A
+by {{ submission.author_list }}%0D%0A
+(see https://scipost.org{{ submission.get_absolute_url }} - first submitted {{ submission.original_submission_date|date:"d M Y" }}).%0D%0A
+%0D%0A
+The refereeing deadline is currently set at {{ submission.reporting_deadline|date:"d M Y" }}.
+%0D%0A
+%0D%0A
+Since SciPost runs an open peer-witnessed refereeing process, your input could help in the evaluation of this manuscript. To provide your expert opinion, after logging in, you can simply follow the Contribute a Report link on the submission page linked above.
+%0D%0A
+%0D%0A
+If you are unfamiliar with SciPost's refereeing workflow, navigating to https://scipost.org/submissions/referee_guidelines will provide you with a quick introduction.
+%0D%0A
+%0D%0A
+[YOUR SIGNATURE]%0D%0A
+%0D%0A

submissions/templates/submissions/referee_guidelines.html

@@ -29,6 +29,7 @@
   <li><a href="#forReferees">For Referees</a>
     <ul>
       <li><a href="#refereeInvited">Have you been invited to write a Report?</a></li>
+      <li><a href="#refereeContributor">Do you wish to contribute a Report?</a></li>
       <li><a href="#refereeWhatIsAsked">What do we ask you in our Report form?</a></li>
       <li><a href="#refereeBeforeWritingReport">Before you write your Report</a></li>
       <li><a href="#refereeWritingReport">Writing your Report</a></li>
@@ -130,6 +131,12 @@
 	</p>
     </ul>
 
+    <h3 id="refereeContributor">Do you wish to contribute a Report?</h3>
+    <p>Perhaps you simply noticed an interesting manuscript currently under evaluation, or perhaps a colleague notified you of its existence via email or other means. You feel that your expertise could be useful to our editorial process.</p>
+    <p>Even if you have not been explicitly invited to referee by one of our Fellows, as a registered Contributor, you can still provide a Report.</p>
+    <p>You can simply follow the Contribute a Report on the manuscript's Submission page. Of course, you'll have to do this before the refereeeing deadline, and you'll have to comply with all our conflict-of-interest rules mentioned above.</p>
+
+
     <h3 id="refereeWhatIsAsked">What do we ask you in our Report form?</h3>
     <p>
       Our Report form is quite intuitive and straightforward, and can be easily filled
@@ -204,21 +211,21 @@
       </li>
     </ul>
 
+  </div>
+
+  <div class="col-6">
+
     <h3 id="refereeGoodReport">The characteristics of a good Report</h3>
     <p>There are no fixed rules or expectations, but a good report is typically:</p>
     <ul>
       <li>constructive and useful to the authors</li>
-      <li>fair to the authors and respectful of their work</li>
+      <li>polite, fair to the authors and respectful of their work</li>
       <li>clear</li>
       <li>succinct</li>
       <li>organized and systematic</li>
-      <li>properly referenced (if further literature is mentioned)</li>
+      <li>properly referenced (if further literature is mentioned).</li>
     </ul>
 
-  </div>
-
-  <div class="col-6">
-
     <h3 id="refereeFAQ">FAQ</h3>
     <ul>
       <li>
@@ -279,7 +286,7 @@
       <li>
 	<h4>Will you pay me to write a Report?</h4>
 	<p>
-	  No. SciPost is not a money-making enterprise (neither for us, nor for you).
+	  No. SciPost is not a profit-making enterprise (neither for us, nor for you).
 	</p>
       </li>
       <li>

submissions/templates/submissions/submission_detail.html

@@ -107,8 +107,11 @@
             {% if submission.is_open_for_reporting or 1 and perms.scipost.can_referee %}
                 {% if not is_author and not is_author_unchecked %}
                     <li>
-                        <h3><a href="{% url 'submissions:submit_report' arxiv_identifier_w_vn_nr=submission.arxiv_identifier_w_vn_nr %}">{% if unfinished_report_for_user %}Finish your report{% else %}Contribute a Report{% endif %}</a></h3>
-                        <div class="text-danger">Deadline for reporting: {{ submission.reporting_deadline|date:"Y-m-d" }}</div>
+                      <h3><a href="{% url 'submissions:submit_report' arxiv_identifier_w_vn_nr=submission.arxiv_identifier_w_vn_nr %}">{% if unfinished_report_for_user %}Finish your report{% else %}Contribute a Report{% endif %}</a></h3>
+                      <div class="text-danger">Deadline for reporting: {{ submission.reporting_deadline|date:"Y-m-d" }}</div>
+		    </li>
+		    <li>
+		      <h4><a href="mailto:?subject=Contribute a Report on a Submission to SciPost?&body={% autoescape on %}{% include 'submissions/contributor_referee_invitation_email.html' %}{% endautoescape %}&cc=edadmin@scipost.org">Invite an expert you know to contribute a Report</a></h4>
                     </li>
                 {% elif is_author_unchecked %}
                     <li>