Improve social link accessibility (#147)

Keep in spirit with https://medium.com/@svinkle/why-let-someone-know-when-a-link-opens-a-new-window-8699d20ed3b1 but address issue #145

layouts/partials/social-follow.html

@@ -1,54 +1,49 @@
 <!-- TODO: Add follow intents where available TODO: Revisit color and hover color -->
-<div hidden>
-  <span id="new-window-0">Opens in a new window</span>
-  <span id="new-window-1">Opens an external site</span>
-  <span id="new-window-2">Opens an external site in a new window</span>
-</div>
 {{ $icon_size := "32px" }}
 {{ with .Param "facebook" }}
-<a href="{{ . }}" target="_blank" class="link-transition facebook link dib z-999 pt3 pt0-l mr1" title="Facebook link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition facebook link dib z-999 pt3 pt0-l mr1" title="Facebook link" rel="noopener" aria-label="follow on Facebook——Opens in a new window">
   {{ partial "svg/facebook.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "twitter" }}
-<a href="{{ . }}" target="_blank" class="link-transition twitter link dib z-999 pt3 pt0-l mr1" title="Twitter link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition twitter link dib z-999 pt3 pt0-l mr1" title="Twitter link" rel="noopener" aria-label="follow on Twitter——Opens in a new window">
   {{ partial "svg/twitter.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "instagram" }}
-<a href="{{ . }}" target="_blank" class="link-transition instagram link dib z-999 pt3 pt0-l mr1" title="Instagram link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition instagram link dib z-999 pt3 pt0-l mr1" title="Instagram link" rel="noopener" aria-label="follow on Instagram——Opens in a new window">
   {{ partial "svg/instagram.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "youtube" }}
-<a href="{{ . }}" target="_blank" class="link-transition youtube link dib z-999 pt3 pt0-l mr1" title="Youtube link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition youtube link dib z-999 pt3 pt0-l mr1" title="Youtube link" rel="noopener" aria-label="follow on Youtube——Opens in a new window">
   {{ partial "svg/youtube.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "linkedin" }}
-<a href="{{ . }}" target="_blank" class="link-transition linkedin link dib z-999 pt3 pt0-l mr1" title="LinkedIn link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition linkedin link dib z-999 pt3 pt0-l mr1" title="LinkedIn link" rel="noopener" aria-label="follow on LinkedIn——Opens in a new window">
   {{ partial "svg/linkedin.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "github" }}
-<a href="{{ . }}" target="_blank" class="link-transition github link dib z-999 pt3 pt0-l mr1" title="Github link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition github link dib z-999 pt3 pt0-l mr1" title="Github link" rel="noopener" aria-label="follow on Github——Opens in a new window">
   {{ partial "svg/github.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "gitlab" }}
-<a href="{{ . }}" target="_blank" class="link-transition gitlab link dib z-999 pt3 pt0-l mr1" title="Gitlab link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition gitlab link dib z-999 pt3 pt0-l mr1" title="Gitlab link" rel="noopener" aria-label="follow on Gitlab——Opens in a new window">
   {{ partial "svg/gitlab.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>
 {{ end }}
 {{ with .Param "medium" }}
-<a href="{{ . }}" target="_blank" class="link-transition medium link dib z-999 pt3 pt0-l mr1" title="Medium link" rel="noopener" aria-describedby="new-window-0">
+<a href="{{ . }}" target="_blank" class="link-transition medium link dib z-999 pt3 pt0-l mr1" title="Medium link" rel="noopener" aria-label="follow on Medium——Opens in a new window">
   {{ partial "svg/medium.svg" (dict "size" $icon_size) }}
   {{- partial "new-window-icon.html" . -}}
 </a>