Add image upload support

Images can be uploaded, thumbnails are created, they're displayed within
the threads themselves. Just like four chans!

There is not an upload size limit set yet. Gotta get on that next.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/views.py

@@ -25,7 +25,7 @@ def get_client_ip(request):
 
 class BoardView(CreateView):
     model = Post
-    fields = ["subject", "name", "text"]
+    fields = ["subject", "name", "text", "image"]
     slug_field = "url"
     slug_url_kwarg = "url"
 
@@ -57,13 +57,12 @@ class BoardView(CreateView):
         form.instance.ip = get_client_ip(self.request)
 
         self.object = form.save()
-
         return HttpResponseRedirect(self.get_success_url())
 
 
 class PostView(CreateView):
     model = Post
-    fields = ["name", "text"]
+    fields = ["name", "text", "image"]
     slug_field = "url"
     slug_url_kwarg = "url"