more status-sensitive email share text

frontend/templates/emails/read_this.txt

@@ -0,0 +1,3 @@
+Thanks to Unglue.it, I'm reading a free, DRM-free ebook of {{ work.title }}.  I think you'd enjoy reading it too.  You can download it at https://{{site}}{% url download work.id %}  You can also copy it, put it on your favorite ereader, and shift it to different formats, freely and legally.
+
+Unglue.it helps book lovers pay creators to make their ebooks free to everyone on earth.  You can help too at https://unglue.it/ .

frontend/views.py

@@ -2011,8 +2011,12 @@ def emailshare(request, action):
                     status = None
             
                 # customize the call to action depending on campaign status
-                if status == 'ACTIVE':
+                if status == 'SUCCESSFUL' or work.first_ebook():
+                    message = render_to_string('emails/read_this.txt',{'request':request,'work':work,'site': Site.objects.get_current()})
+                    subject = 'I think you\'d like this book I\'m reading'
+                elif status == 'ACTIVE':
                     message = render_to_string('emails/pledge_this.txt',{'request':request,'work':work,'site': Site.objects.get_current()})
+                    subject = 'Please help me give this book to the world'
                 else:
                     message = render_to_string('emails/wish_this.txt',{'request':request,'work':work,'site': Site.objects.get_current()})
                     subject = 'Come see one of my favorite books on Unglue.it'