update markdown maker with comments

make_markdown.sh

 #!/bin/bash
+
+
+#
+# make markdown version of astro-lyx.lyx
+#
+
+# use lyx to export astro-lyx.lyx in latex
 lyx --export latex astro-lyx.lyx
+# remove inputenc and fontenc (these freeze pandoc)
 cat astro-lyx.tex |grep -v inputenc|grep -v fontenc > a.tex ; mv a.tex astro-lyx.tex
+# run through pandoc to make markdown version
+iconv -t utf-8 astro-lyx.tex | pandoc -s --wrap=none -f latex -t markdown | perl -pe "s/\{.*? \.unnumbered\}//g; s/\\\$\\\\rightarrow\\\$/\→/g;" > astro-lyx.md
+
+# export also as pdf
 lyx --export pdf astro-lyx.lyx
-iconv -t utf-8 astro-lyx.tex | pandoc -s --wrap=none -f latex -t markdown   | perl -pe "s/\{.*? \.unnumbered\}//g; s/\\\$\\\\rightarrow\\\$/\→/g;" > astro-lyx.md