added group picture and updated sidebar ... again (sorry for the commit mess - used to a different process and toolset)

Author: Georg Gruetter

_includes/_sidebar.html

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 		<h3><a href="/InnerSourceCommons/events/">ISC Events</a></h3>
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-        The <a href="/InnerSourceCommons/events/isc-spring-2018/">spring 2018 summit</a> May 16-18, 2018 is now over, with its agenda packed with interesting <a href="http://paypal.github.io/InnerSourceCommons/events/isc-spring-2018-speakers" alt="Our speakers">speakers</a> and <a href="http://paypal.github.io/InnerSourceCommons/events/isc-spring-2018-agenda" alt="Our presentations">presentations</a>. The group photo from Renningen, Germany will be posted soon.</p>
+        The <a href="/InnerSourceCommons/events/isc-spring-2018/">spring 2018 summit</a> May 16-18, 2018 is now over, with its agenda packed with interesting <a href="http://paypal.github.io/InnerSourceCommons/events/isc-spring-2018-speakers" alt="Our speakers">speakers</a> and <a href="http://paypal.github.io/InnerSourceCommons/events/isc-spring-2018-agenda" alt="Our presentations">presentations</a>. The group photo from Renningen, Germany as well as links to other pictures and videos has been added to the <a href="/InnerSourceCommons/events/isc-spring-2018/">ISC.S6 event page</a>, now.</p>
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-		  It's now time to consider the <a href="/InnerSourceCommons/events/isc-fall-2018/">fall 2018 summit</a> October 3-5 in Islandia, New York, USA. The <a href="/InnerSourceCommons/events/isc-fall-2018-cfp/">Call For Papers</a> is now open through July 2018.
+        It's now time to consider the <a href="/InnerSourceCommons/events/isc-fall-2018/">fall 2018 summit</a> October 3-5 in Islandia, New York, USA. The <a href="/InnerSourceCommons/events/isc-fall-2018-cfp/">Call For Papers</a> is now open through July 2018 and the <a href="https://www.brownpapertickets.com/event/3444630">registration</a> is now open, as well.
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