stop using first_ebook where it means is_free

frontend/templates/work.html

@@ -4,7 +4,7 @@
 {% load purchased %}
 {% load lib_acqs %}
 {% block title %}— 
-    {% if work.first_ebook %}
+    {% if work.is_free %}
         {{ work.title }} is a Free eBook
     {% else %}
         Help us make  {{ work.title }} a Free eBook!
@@ -416,7 +416,7 @@
                                                 {% endif %}
                                             {% endif %}
                                         {% endif %}
-                                        {% if work.first_ebook %}
+                                        {% if work.is_free %}
                                             <h4>Downloads</h4>
                                             <div class="pledged-info">
                                                 This work has been downloaded {{ work.download_count }} times via unglue.it ebook links.
@@ -515,7 +515,7 @@
                         {% endif %}{% endif %}
                       {% endif %}{% endif %}
                     {% else %}
-                        {% if work.first_ebook %}
+                        {% if work.is_free %}
                             <div class="btn_support">
                                 <a href="{% url download work_id %}" class="hijax"><span>Download</span></a>
                             </div>
@@ -539,7 +539,7 @@
                         <div class="jsmod-content">
                             <ul class="social menu">
                                 <a href="https://www.facebook.com/sharer.php?u={{request.build_absolute_uri|urlencode:"" }}"><li class="facebook first"><span>Facebook</span></li></a>
-                                {% if work.first_ebook %}
+                                {% if work.is_free %}
                                     <a href="https://twitter.com/intent/tweet?url={{request.build_absolute_uri|urlencode:"" }}&amp;text=I%27m%20enjoying%20{{ work.title|urlencode }}%2C%20a%20free%2C%20DRM%2Dfree%20ebook%2E%20You%20can%20too%21"><li class="twitter"><span>Twitter</span></li></a>
                                 {% else %}
                                     {% ifequal status 'SUCCESSFUL' %}
@@ -750,7 +750,7 @@
                     {% endif %}
                 </div>
                 {% if request.user.libpref %}
-                {% if work.first_ebook or work.ebookfiles %}
+                {% if work.is_free or work.ebookfiles %}
                 <div id="libtools">
                     <p>for libraries...</p>
                     <form method="POST" id="record_form" action="{% url work_marc work.id %}">

frontend/views.py

@@ -2923,7 +2923,7 @@ def feature(request, work_id):
         return render(request, "admins_only.html")
     else:
         work = safe_get_work(work_id)
-        if work.first_ebook():
+        if work.is_free:
             work.featured = now()
             work.save()
             return HttpResponseRedirect(reverse('landing', args=[] ))