Add responsiveness for footer. Update gulpjs, package.json and bootstrap sass

static/assets/bootstrap/sass/_print.sass

@@ -0,0 +1,124 @@
+// stylelint-disable declaration-no-important, selector-no-qualifying-type
+
+// Source: https://github.com/h5bp/html5-boilerplate/blob/master/src/css/main.css
+
+// ==========================================================================
+// Print styles.
+// Inlined to avoid the additional HTTP request:
+// https://www.phpied.com/delay-loading-your-print-css/
+// ==========================================================================
+
+@if $enable-print-styles
+  @media print
+    *,
+    *::before,
+    *::after
+      // Bootstrap specific; comment out `color` and `background`
+      //color: $black !important; // Black prints faster
+      text-shadow: none !important
+
+      //background: transparent !important;
+      box-shadow: none !important
+
+    a
+      &:not(.btn)
+        text-decoration: underline
+
+    // Bootstrap specific; comment the following selector out
+    //a[href]::after {
+    //  content: " (" attr(href) ")";
+    //}
+
+    abbr[title]::after
+      content: " (" attr(title) ")"
+
+    // Bootstrap specific; comment the following selector out
+    //
+    // Don't show links that are fragment identifiers,
+    // or use the `javascript:` pseudo protocol
+    //
+
+    //a[href^="#"]::after,
+    //a[href^="javascript:"]::after {
+    // content: "";
+    //}
+
+    pre
+      white-space: pre-wrap !important
+
+    pre,
+    blockquote
+      border: $border-width solid $gray-500
+
+      // Bootstrap custom code; using `$border-width` instead of 1px
+      page-break-inside: avoid
+
+    //
+    // Printing Tables:
+    // http://css-discuss.incutio.com/wiki/Printing_Tables
+    //
+
+    thead
+      display: table-header-group
+
+    tr,
+    img
+      page-break-inside: avoid
+
+    p,
+    h2,
+    h3
+      orphans: 3
+      widows: 3
+
+    h2,
+    h3
+      page-break-after: avoid
+
+    // Bootstrap specific changes start
+
+    // Specify a size and min-width to make printing closer across browsers.
+    // We don't set margin here because it breaks `size` in Chrome. We also
+    // don't use `!important` on `size` as it breaks in Chrome.
+    @page
+      size: $print-page-size
+
+    body
+      min-width: $print-body-min-width !important
+
+    .container
+      min-width: $print-body-min-width !important
+
+    // Bootstrap components
+    .navbar
+      display: none
+
+    .badge
+      border: $border-width solid $black
+
+    .table
+      border-collapse: collapse !important
+
+      td,
+      th
+        background-color: $white !important
+
+    .table-bordered
+      th,
+      td
+        border: 1px solid $gray-300 !important
+
+    .table-dark
+      color: inherit
+
+      th,
+      td,
+      thead th,
+      tbody + tbody
+        border-color: $table-border-color
+
+    .table .thead-dark th
+      color: inherit
+      border-color: $table-border-color
+
+    // Bootstrap specific changes end