Add preliminary report system

The report system is pretty low-tech. However the scaffolding is there
for a lot of new stuff. What we currently have:

* Users can create reports
* Staff can view reports
* Admins can create report templates

There's a post drop-down menu available on all posts now, too. This is
where "report post" menu item lives and other things like that can be
added too.

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

board/urls.py

@@ -1,6 +1,7 @@
 from django.urls import path
 from django.conf import settings
 from django.conf.urls.static import static
+from django.views.generic.base import TemplateView
 from board.views import *
 
 
@@ -9,6 +10,12 @@ urlpatterns = [
     path("<slug:url>/", BoardView.as_view(), name="board_detail"),
     path("<slug:url>/page/<int:page>/", BoardView.as_view(), name="board_detail"),
     path("<slug:url>/post/<int:id>/", PostView.as_view(), name="post_detail"),
+    path("<slug:url>/report/<int:id>/", ReportView.as_view(), name="report_form"),
+    path(
+        "report/success/",
+        TemplateView.as_view(template_name="board/report_success.html"),
+        name="report_success",
+    ),
 ]
 # TODO - make this conditional so we can serve images up with whatever server we want
 urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)