doc: fixing pandoc compilation error under ubuntu 16.04

doc/startup-guide/Makefile

@@ -24,7 +24,8 @@ TEX=$(SRC:.md=.tex)
 DOC=$(SRC:.md=.doc)
 
 ## Pandoc arguments
-OPTIONS=-f markdown --toc --number-sections --smart
+EXTENSIONS=+definition_lists
+OPTIONS=-f markdown$(EXTENSIONS) --toc --number-sections --smart
 TEMPLATE=pandoc.latex 
 
 

doc/startup-guide/pandoc.latex

@@ -55,6 +55,10 @@
 %% Generic
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+\providecommand{\tightlist}{%
+  \setlength{\itemsep}{0pt}\setlength{\parskip}{0pt}}
+
+
 $if(url)$
 \usepackage{url}
 $endif$