How can I enable unit templates?

Hope that helps I found the answer thanks to the comment from Todd Smith in the original question.
The ASP.Net MVC item templates should be available in the "Add New Item..." dialog, under Web -> MVC.

<ProjectTypeGuids>{603c0e0b-db56-11dc-be95-000d561079b0};{349c5851-65df-11da-9384-00065b846f21};{F184B08F-C81C-45F6-A57F-5ABD9991F28F}</ProjectTypeGuids>

it fixes the issue All of the item templates for visual studio are run from this directory:

hop of those help? Take a look at Jinja2's i18n Extension documentation. Calling install_gettext_translations basically sets the object through which Jinja2 will call gettext, ngettext, etc, in order to translate strings when it encounters a {% trans %} tag.
Since those functions are defined on webapp2.i18n (see here), jinja2 will successfully call those functions to retrieve translations, dependent upon your call to set_locale inside of the request. I don't have the code in front of me, but I'd guess that gettext and company defined in webapp2.i18n are merely proxies to call webapp.i18.get_i18n().gettext, which is the magic that makes all of this work.

This might help you
Settings/Preferences | Languages & Frameworks | Template Data Languages

This might help you The default network in the project comes with default firewall rules "default-allow-http" and "default-allow-https" to allow traffic on port 80 and 443. These rules have a target tag setup as "http-server". When setting up the instance template you can check the box "Allow HTTP traffic" and "Allow HTTPS traffic" from your developer console, by doing that the default firewall rules will be applied to the new instances created through this instance template.