changed the static snippet to use double quotes like every other command

UltiSnips/jinja.snippets

@@ -15,7 +15,7 @@ snippet for "For loop"
 endsnippet
 
 snippet static "Django static route" i
-{% static '$0' %}
+{% static "$0" %}
 endsnippet
 
 snippet url "Django URL resolver" i
@@ -41,3 +41,7 @@ snippet comment "Make code a comment"
 	${0:${VISUAL}}
 {% endcomment %}
 endsnippet
+
+snippet modeline "Sets the modeline to HTMLDjango"
+{# vim:set ft=htmldjango: #}
+endsnippet