Updating site to use USWDS styles (#509)

* Updated header and footer
* Updated fonts
* Moved files around and updated gulpfile to correct the build process when it goes to production
* Adjusted grid templating
* Added images to assets
* Update app/templates/components/uk_components/footer/template.njk

Co-authored-by: Steven Reilly <stvnrlly@users.noreply.github.com>

app/templates/views/new-password.html

@@ -11,10 +11,10 @@
 <div class="govuk-grid-row">
   <div class="govuk-grid-column-two-thirds">
     {% if user %}
-      <h1 class="heading-large">
+      <h1 class="font-body-2xl margin-bottom-3">
         Create a new password
       </h1>
-      <p class="govuk-body">
+      <p>
         You can now create a new password for your account.
       </p>
       {% call form_wrapper() %}
@@ -22,7 +22,7 @@
         {{ page_footer("Continue") }}
       {% endcall %}
     {% else %}
-      <p class="govuk-body">
+      <p>
         Message about email address does not exist. Some one needs to figure out the words here.
       </p>
     {% endif %}