Add MathJax

Makefile

@@ -48,6 +48,7 @@ preview : $(DST_ALL)
 %.html : %.md _layouts/page.html $(FILTERS)
 	${PANDOC} -s -t html \
 	    ${PANDOC_FLAGS} \
+	    --mathjax \
 	    --template=_layouts/page \
 	    --filter=tools/filters/blockquote2div.py \
 	    --filter=tools/filters/id4glossary.py \

_includes/javascript.html

 <!-- Javascript placed at the end of the document so the pages load faster -->
 <script src="http://software-carpentry.org/v5/js/jquery-1.9.1.min.js"></script>
 <script src="css/bootstrap/bootstrap-js/bootstrap.js"></script>
+<script src='https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML'></script>