Clean Article stats

kfet.statistic
- delete no longer used defs
- new mixin - ScaleMixin
  - get scale args from GET params
  - chunkify querysets according to a scale

Article stats
- use SingleResumeStat for manifest
- use ScaleMixin for sales
- update urls
- update permission required: teamkfet

Account stats
- update permission required: teamkfet
- operations use ScaleMixin
- fix manifests urls

kfet/urls.py

@@ -140,20 +140,14 @@ urlpatterns = [
     # Article - Update
     url('^articles/(?P<pk>\d+)/edit$',
         teamkfet_required(views.ArticleUpdate.as_view()),
-        name = 'kfet.article.update'),
+        name='kfet.article.update'),
     # Article - Statistics
-    url('^articles/(?P<pk>\d+)/stat/last/$',
-        views.ArticleStatLastAll.as_view(),
-        name = 'kfet.article.stat.last'),
-    url('^articles/(?P<pk>\d+)/stat/last/month/$',
-        views.ArticleStatLastMonth.as_view(),
-        name = 'kfet.article.stat.last.month'),
-    url('^articles/(?P<pk>\d+)/stat/last/week/$',
-        views.ArticleStatLastWeek.as_view(),
-        name = 'kfet.article.stat.last.week'),
-    url('^articles/(?P<pk>\d+)/stat/last/day/$',
-        views.ArticleStatLastDay.as_view(),
-        name = 'kfet.article.stat.last.day'),
+    url(r'^articles/(?P<pk>\d+)/stat/sales/list$',
+        views.ArticleStatSalesList.as_view(),
+        name='kfet.article.stat.sales.list'),
+    url(r'^articles/(?P<pk>\d+)/stat/sales$',
+        views.ArticleStatSales.as_view(),
+        name='kfet.article.stat.sales'),
 
     # -----
     # K-Psul urls