Added email templates

src/series/templates/email/error_series_notification.html

@@ -0,0 +1,15 @@
+{% autoescape off %}
+
+Hi {{ user.username }},
+There are new episodes of the series you recorded.
+
+Some series could not be updated:
+{% for e in error_series_list %}
+e.title
+{% endfor %}
+
+{% for s in new_series_list %}
+{{s.series.title}}: watched - {{s.series.watched_season}}-{{s.series.watched_episode}}, last - {{s.last_season}}-{{s.last_episode}}, new episodes count - {{s.new_episodes_count}}
+{% endfor %}
+
+{% endautoescape %}