adding reseaerchgate

_layouts/person.html

@@ -95,6 +95,12 @@ layout: default
 		  <img style="width:50px;height:50px" src="/public/zbmath.png" title="zbMATH"/>
 		</a>
                 {% endif %}
+                {% if page.researchgate %}
+                <a target="_blank"
+		   href="https://www.researchgate.net/profile/{{page.researchgate}}">
+		  <img style="width:50px;height:50px" src="/public/researchgate.png" title="ResearchGate"/>
+		</a>
+                {% endif %}
                 {% if page.github %}
                 <a target="_blank" href="http://github.com/{{page.github}}">
 		  <img style="width:50px;height:50px" src="/public/github.png" title="GitHub"/>

people/mkohlhase.md

@@ -14,6 +14,7 @@ gitlab: mkohlhase
 mathhub: mkohlhase
 dblp: k/Kohlhase:Michael
 zbmath: kohlhase.michael
+researchgate:Michael_Kohlhase
 publink: auto
 affiliation: "Informatik, FAU Erlangen-Nürnberg &  Computer  Science, Carnegie Mellon University"
 ---