Place Supporters counter on front & sponsors pages

The number of current supporters now appears on the frontpage and the
sponsors page.

www/conservancy/frontpage.py

@@ -1,4 +1,5 @@
 from django.shortcuts import render_to_response
+from conservancy.apps.supporters.models import Supporter as Supporter
 from conservancy.apps.news.models import PressRelease
 from conservancy.apps.blog.models import Entry as BlogEntry
 from datetime import datetime, timedelta
@@ -9,11 +10,13 @@ def view(request):
     Performs all object queries necessary to render the front page.
     """
 
+    supporters_count = len(Supporter.objects.all().filter(display_until_date__gte=datetime.now()))
     press_releases = PressRelease.objects.all().filter(pub_date__lte=datetime.now(), sites=2)[:5]
     blog = BlogEntry.objects.all().filter(pub_date__lte=datetime.now())[:3]
 
     c = {
         'press_releases': press_releases,
+        'supporters_count': supporters_count,
         'blog' : blog
     }
     return render_to_response("frontpage.html", c)

www/conservancy/sponsors.py

@@ -9,11 +9,13 @@ def view(request):
     """
 
     supporters = Supporter.objects.all().filter(display_until_date__gte=datetime.now())
+    supporters_count = len(supporters)
     anonymous_count  = len(supporters.filter(display_name = 'Anonymous'))
     supporters = supporters.exclude(display_name = 'Anonymous')
 
     c = {
         'supporters' : supporters,
+        'supporters_count' : supporters_count,
         'anonymous_count' : anonymous_count
     }
     return render_to_response("sponsors.html", c)

www/conservancy/templates/frontpage.html

@@ -36,7 +36,7 @@
 <h2>Support Conservancy</h2>
 <p>As a 501(c)(3) non-profit organization, Conservancy relies on
   charitable donations for its operations.
-  Please <a href="/supporter/"><strong>become a Conservancy support
+  Please join {{supporters_count|safe}} others and <a href="/supporter/"><strong>become a Conservancy support
   today</strong></a> and/or <a href="/donate/">donate generously</a> to help our work!
 </p>
 <h2>Follow Conservancy News &amp; Blogs</h2>

www/conservancy/templates/sponsors.html

@@ -51,7 +51,8 @@ any of its sponsors.</p>
 <br/>
 <h2>Supporters</h2>
 
-<p>Conservancy Supporters are individuals who give $120 or more annually as
+<p>Conservancy currently has {{supporters_count|safe}} Supporters.
+  Conservancy Supporters are individuals who give $120 or more annually as
   part of <a href="/supporter/">the Official Conservancy Supporter
   program</a>.  Those who request public acknowledgment are listed here in
   alphabetical order by surname:</p>