adding titles for tooltips

_layouts/person.html

@@ -66,36 +66,55 @@ layout: default
             </div>
             <div class="card-action">
                 {% if page.publink == "auto" %}
-                  <a href="http://kwarc.github.io/bibs/{{username}}/"><img style="width:60px;height:60px" src="/public/pubs.jpg"/></a>
+                <a href="http://kwarc.github.io/bibs/{{username}}/">
+		  <img style="width:60px;height:60px" src="/public/pubs.jpg" title="Publications"/>
+		</a>
                 {% elsif page.publink %}
-                  <a href="{{page.publink}}"><img style="width:60px;height:60px" src="/public/pubs.jpg"/></a>
+                <a href="{{page.publink}}">
+		  <img style="width:60px;height:60px" src="/public/pubs.jpg" title="Publications"/>
+		</a>
                 {% endif %}
                 {% if page.website %}
-                <a target="_blank" href="{{page.website}}"><img style="width:60px;height:60px" src="/public/www.jpg"/></a>
+                <a target="_blank" href="{{page.website}}">
+		  <img style="width:60px;height:60px" src="/public/www.jpg" title="Website"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.orcid %}
-                <a target="_blank" href="http://orcid.org/{{page.orcid}}"><img style="width:60px;height:60px" src="/public/orcid.png"/> </a>
+                <a target="_blank" href="http://orcid.org/{{page.orcid}}">
+		  <img style="width:60px;height:60px" src="/public/orcid.png" title="ORCID"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.dblp %}
-                <a target="_blank" href="https://dblp.uni-trier.de/pers/hd/{{page.dblp}}"><img style="width:60px;height:60px" src="/public/dblp.png"/> </a>
+                <a target="_blank" href="https://dblp.uni-trier.de/pers/hd/{{page.dblp}}">
+		  <img style="width:60px;height:60px" src="/public/dblp.png" title="DBLP"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.zbmath %}
-                <a target="_blank" href="https://zbmath.org/authors/?q=ai:{{page.zbmath}}"><img style="width:60px;height:60px" src="/public/zbmath.png"/> </a>
+                <a target="_blank"
+		   href="https://zbmath.org/authors/?q=ai:{{page.zbmath}}">
+		  <img style="width:60px;height:60px" src="/public/zbmath.png" title="zbMATH"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.github %}
-                <a target="_blank" href="http://github.com/{{page.github}}"><img style="width:60px;height:60px" src="/public/github.png"/></a>
+                <a target="_blank" href="http://github.com/{{page.github}}">
+		  <img style="width:60px;height:60px" src="/public/github.png" title="GitHub"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.gitlab %}
-                <a target="_blank" href="http://gitlab.com/{{page.gitlab}}"><img style="width:60px;height:60px" src="/public/gitlab.png"/></a>
+                <a target="_blank" href="http://gitlab.com/{{page.gitlab}}">
+		  <img style="width:60px;height:60px" src="/public/gitlab.png" title="GitLab"/>
+		</a>
                 &nbsp;
                 {% endif %}
                 {% if page.mathhub %}
-                <a target="_blank" href="http://gl.mathhub.info/{{page.mathhub}}"><img style="width:60px;height:60px" src="/public/mathHubLogo.png"/></a>
+                <a target="_blank" href="http://gl.mathhub.info/{{page.mathhub}}">
+		  <img style="width:60px;height:60px" src="/public/mathHubLogo.png" title="MathHub"/>
+		</a>
                 &nbsp;
                 {% endif %}
             </div>