Django 1.11: Template now accepts backend in __init__.
Django 1.11: Template now accepts backend in __init__.

This makes our `zproject.jinja2.backend.Template` compatible with
Jinja2. After this change we don't need to override __init__ function
in Template class.

The only reason we now need to create our own Template class is that
we need to send template_rendered signals.

We need our own Jinja2 class because we need to maintain backward
compatibility with Django 1.10 and we need inject `debug` parameter.

timabbott/zulip,rishig/zulip,shubhamdhama/zulip,hackerkid/zulip,vabs22/zulip,tommyip/zulip,brockwhittaker/zulip,rishig/zulip,rishig/zulip,vabs22/zulip,dhcrzf/zulip,brockwhittaker/zulip,shubhamdhama/zulip,jackrzhang/zulip,rht/zulip,Galexrt/zulip,dhcrzf/zulip,timabbott/zulip,shubhamdhama/zulip,showell/zulip,hackerkid/zulip,dhcrzf/zulip,andersk/zulip,eeshangarg/zulip,shubhamdhama/zulip,Galexrt/zulip,shubhamdhama/zulip,brainwane/zulip,jackrzhang/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,amanharitsh123/zulip,jackrzhang/zulip,hackerkid/zulip,tommyip/zulip,vabs22/zulip,mahim97/zulip,vaidap/zulip,andersk/zulip,zulip/zulip,rht/zulip,tommyip/zulip,timabbott/zulip,jackrzhang/zulip,eeshangarg/zulip,amanharitsh123/zulip,kou/zulip,kou/zulip,vabs22/zulip,hackerkid/zulip,rht/zulip,synicalsyntax/zulip,Galexrt/zulip,brainwane/zulip,brockwhittaker/zulip,jrowan/zulip,timabbott/zulip,verma-varsha/zulip,mahim97/zulip,brainwane/zulip,vaidap/zulip,punchagan/zulip,synicalsyntax/zulip,eeshangarg/zulip,showell/zulip,jrowan/zulip,vaidap/zulip,brainwane/zulip,eeshangarg/zulip,verma-varsha/zulip,zulip/zulip,brockwhittaker/zulip,mahim97/zulip,jrowan/zulip,amanharitsh123/zulip,showell/zulip,verma-varsha/zulip,jrowan/zulip,Galexrt/zulip,andersk/zulip,showell/zulip,rishig/zulip,dhcrzf/zulip,dhcrzf/zulip,amanharitsh123/zulip,kou/zulip,synicalsyntax/zulip,kou/zulip,showell/zulip,punchagan/zulip,andersk/zulip,tommyip/zulip,Galexrt/zulip,andersk/zulip,verma-varsha/zulip,shubhamdhama/zulip,jrowan/zulip,andersk/zulip,eeshangarg/zulip,vabs22/zulip,rht/zulip,verma-varsha/zulip,synicalsyntax/zulip,amanharitsh123/zulip,zulip/zulip,punchagan/zulip,rishig/zulip,punchagan/zulip,mahim97/zulip,vabs22/zulip,brainwane/zulip,rishig/zulip,jackrzhang/zulip,zulip/zulip,jrowan/zulip,hackerkid/zulip,tommyip/zulip,kou/zulip,zulip/zulip,rht/zulip,shubhamdhama/zulip,dhcrzf/zulip,dhcrzf/zulip,punchagan/zulip,amanharitsh123/zulip,jackrzhang/zulip,brainwane/zulip,brockwhittaker/zulip,mahim97/zulip,punchagan/zulip,synicalsyntax/zulip,vaidap/zulip,punchagan/zulip,synicalsyntax/zulip,timabbott/zulip,kou/zulip,timabbott/zulip,tommyip/zulip,vaidap/zulip,rishig/zulip,hackerkid/zulip,eeshangarg/zulip,showell/zulip,hackerkid/zulip,vaidap/zulip,verma-varsha/zulip,tommyip/zulip,rht/zulip,synicalsyntax/zulip,jackrzhang/zulip,showell/zulip,zulip/zulip,kou/zulip,mahim97/zulip,brockwhittaker/zulip,brainwane/zulip,rht/zulip,timabbott/zulip,Galexrt/zulip,Galexrt/zulip