added line statements

[josephmancuso]

Not sure why it took so long to do this but I added jinja2 line statements. Instead of writing templates like this:

{% extends 'base/nav.html' %}

{% block content %}

{% if some_variable %}
    {{ variable }}
{% endif %}

{% endblock %}

we can now do:

@extends 'base/nav.html'

@block content
    @if some_variable:
        {{ variable }}
    @endif
@endblock

[coveralls]

Coverage remained the same at 87.934% when pulling 494e748 on feature-650-1 into 283edc9 on master.