AK Slides

This introduces slide generation for AKs of an event (#66 (closed)).

Features:

• Introduce latex export
• Slides of AKs grouped by their category
• Exclude wishes and display as own category
• Show next two AKs in footer for presenter preparation
• Allow to choose whether all AKs or only the ones with presentation flag should be shown

AKModel/templates/AKModel/export/slides.tex

@@ -62,7 +62,7 @@
 
         \faFilter~ {{ ak.category.name | latex_escape_utf8 }}
 
-        {{ ak.description | latex_escape_utf8 }}
+        {{ ak.description | truncatechars(500) | latex_escape_utf8 }}
 
     \end{frame}