Update dashboard and template flow (#514)

* Updated header and footer
* Moved files around and updated gulpfile to correct the build process when it goes to production
* Updated fonts
* Adjusted grid templating
* Adding images to assets
* Updated account pages, dashboard, and pages in message sending flow
* Updated the styling for the landing pages in the account section once logged in

app/assets/javascripts/fileUpload.js

@@ -6,7 +6,7 @@
     this.submit = () => this.$form.trigger('submit');
 
     this.showCancelButton = () => $('.file-upload-button', this.$form).replaceWith(`
-      <a href="" class='govuk-button govuk-button--warning govuk-!-margin-right-1'>Cancel upload</a>
+      <a href="" class='usa-button usa-button--secondary'>Cancel upload</a>
     `);
 
     this.start = function(component) {
@@ -15,7 +15,8 @@
 
       // The label gets styled like a button and is used to hide the native file upload control. This is so that
       // users see a button that looks like the others on the site.
-      this.$form.find('label.file-upload-button').addClass('govuk-button govuk-!-margin-right-1');
+// 
+      this.$form.find('label.file-upload-button').addClass('usa-button');
 
       // Clear the form if the user navigates back to the page
       $(window).on("pageshow", () => this.$form[0].reset());